diff --git a/src/modsecurity.cc b/src/modsecurity.cc
index 0380d346..3a0d3d03 100644
--- a/src/modsecurity.cc
+++ b/src/modsecurity.cc
@@ -21,8 +21,10 @@
 #include <yajl/yajl_tree.h>
 #include <yajl/yajl_gen.h>
 #endif
+#ifdef WITH_LIBXML2
 #include <libxml/xmlschemas.h>
 #include <libxml/xpath.h>
+#endif
 #ifdef MSC_WITH_CURL
 #include <curl/curl.h>
 #endif
@@ -78,7 +80,9 @@ ModSecurity::ModSecurity()
 #ifdef MSC_WITH_CURL
     curl_global_init(CURL_GLOBAL_ALL);
 #endif
+#ifdef WITH_LIBXML2
     xmlInitParser();
+#endif
 }
 
 
@@ -89,8 +93,9 @@ ModSecurity::~ModSecurity() {
 #ifdef WITH_GEOIP
     Utils::GeoLookup::getInstance().cleanUp();
 #endif
+#ifdef WITH_LIBXML2
     xmlCleanupParser();
-
+#endif
     delete m_global_collection;
     delete m_resource_collection;
     delete m_ip_collection;
diff --git a/src/operators/validate_dtd.cc b/src/operators/validate_dtd.cc
index bb3e05c4..5767a6a4 100644
--- a/src/operators/validate_dtd.cc
+++ b/src/operators/validate_dtd.cc
@@ -24,7 +24,7 @@
 namespace modsecurity {
 namespace operators {
 
-
+#ifdef WITH_LIBXML2
 bool ValidateDTD::init(const std::string &file, std::string *error) {
     std::string err;
     m_resource = utils::find_resource(m_param, file, &err);
@@ -112,7 +112,7 @@ bool ValidateDTD::evaluate(Transaction *t, const std::string &str) {
 
     return false;
 }
-
+#endif
 
 }  // namespace operators
 }  // namespace modsecurity
diff --git a/src/operators/validate_dtd.h b/src/operators/validate_dtd.h
index a533398f..a3440d05 100644
--- a/src/operators/validate_dtd.h
+++ b/src/operators/validate_dtd.h
@@ -19,9 +19,10 @@
 #include <stdio.h>
 #include <stdarg.h>
 #include <string.h>
+#ifdef WITH_LIBXML2
 #include <libxml/xmlschemas.h>
 #include <libxml/xpath.h>
-
+#endif
 #include <string>
 #include <memory>
 #include <utility>
@@ -37,6 +38,7 @@ class ValidateDTD : public Operator {
     /** @ingroup ModSecurity_Operator */
     explicit ValidateDTD(std::unique_ptr<RunTimeString> param)
         : Operator("ValidateDTD", std::move(param)) { }
+#ifdef WITH_LIBXML2
     ~ValidateDTD() {
         if (m_dtd != NULL) {
             xmlFreeDtd(m_dtd);
@@ -92,6 +94,7 @@ class ValidateDTD : public Operator {
  private:
     std::string m_resource;
     xmlDtdPtr m_dtd;
+#endif
 };
 
 }  // namespace operators
diff --git a/src/operators/validate_schema.cc b/src/operators/validate_schema.cc
index 8bf97bce..658c8674 100644
--- a/src/operators/validate_schema.cc
+++ b/src/operators/validate_schema.cc
@@ -25,6 +25,8 @@
 namespace modsecurity {
 namespace operators {
 
+#ifdef WITH_LIBXML2
+
 bool ValidateSchema::init(const std::string &file, std::string *error) {
     std::string err;
     m_resource = utils::find_resource(m_param, file, &err);
@@ -146,6 +148,7 @@ bool ValidateSchema::evaluate(Transaction *t,
     return false;
 }
 
+#endif
 
 }  // namespace operators
 }  // namespace modsecurity
diff --git a/src/operators/validate_schema.h b/src/operators/validate_schema.h
index e1becf3f..e07e237b 100644
--- a/src/operators/validate_schema.h
+++ b/src/operators/validate_schema.h
@@ -19,9 +19,10 @@
 #include <stdio.h>
 #include <stdarg.h>
 #include <string.h>
+#ifdef WITH_LIBXML2
 #include <libxml/xmlschemas.h>
 #include <libxml/xpath.h>
-
+#endif
 #include <string>
 #include <memory>
 #include <utility>
@@ -35,6 +36,10 @@ namespace operators {
 class ValidateSchema : public Operator {
  public:
     /** @ingroup ModSecurity_Operator */
+#ifndef WITH_LIBXML2
+    explicit ValidateSchema(std::unique_ptr<RunTimeString> param)
+        : Operator("ValidateSchema", std::move(param)) { }
+#else
     explicit ValidateSchema(std::unique_ptr<RunTimeString> param)
         : Operator("ValidateSchema", std::move(param)),
         m_parserCtx(NULL),
@@ -133,6 +138,7 @@ class ValidateSchema : public Operator {
     xmlSchemaPtr m_schema;
     std::string m_resource;
     std::string m_err;
+#endif
 };
 
 }  // namespace operators
diff --git a/src/request_body_processor/xml.cc b/src/request_body_processor/xml.cc
index bca1a22e..26d494e1 100644
--- a/src/request_body_processor/xml.cc
+++ b/src/request_body_processor/xml.cc
@@ -23,6 +23,7 @@
 namespace modsecurity {
 namespace RequestBodyProcessor {
 
+#ifdef WITH_LIBXML2
 
 XML::XML(Transaction *transaction)
     : m_transaction(transaction) {
@@ -148,6 +149,7 @@ bool XML::complete(std::string *error) {
     return true;
 }
 
+#endif
 
 }  // namespace RequestBodyProcessor
 }  // namespace modsecurity
diff --git a/src/request_body_processor/xml.h b/src/request_body_processor/xml.h
index e3ca8723..2616c36a 100644
--- a/src/request_body_processor/xml.h
+++ b/src/request_body_processor/xml.h
@@ -13,9 +13,10 @@
  *
  */
 
-
+#ifdef WITH_LIBXML2
 #include <libxml/xmlschemas.h>
 #include <libxml/xpath.h>
+#endif
 
 #include <string>
 #include <iostream>
@@ -30,6 +31,7 @@
 namespace modsecurity {
 namespace RequestBodyProcessor {
 
+#ifdef WITH_LIBXML2
 
 struct xml_data {
     xmlSAXHandler *sax_handler;
@@ -63,6 +65,8 @@ class XML {
     std::string m_header;
 };
 
+#endif
+
 }  // namespace RequestBodyProcessor
 }  // namespace modsecurity
 
diff --git a/src/transaction.cc b/src/transaction.cc
index a6a967c6..574cd54b 100644
--- a/src/transaction.cc
+++ b/src/transaction.cc
@@ -126,7 +126,11 @@ Transaction::Transaction(ModSecurity *ms, Rules *rules, void *logCbData)
 #else
     m_json(NULL),
 #endif
+#ifdef WITH_LIBXML2
     m_xml(new RequestBodyProcessor::XML(this)),
+#else
+    m_xml(NULL),
+#endif
     TransactionAnchoredVariables(this) {
     m_id = std::to_string(this->m_timeStamp) + \
         std::to_string(modsecurity::utils::generate_transaction_unique_id());
@@ -159,7 +163,9 @@ Transaction::~Transaction() {
 #ifdef WITH_YAJL
     delete m_json;
 #endif
+#ifdef WITH_LIBXML2
     delete m_xml;
+#endif
 }
 
 
@@ -666,6 +672,7 @@ int Transaction::processRequestBody() {
      */
     std::unique_ptr<std::string> a = m_variableRequestHeaders.resolveFirst(
         "Content-Type");
+#ifdef WITH_LIBXML2
     if (m_requestBodyProcessor == XMLRequestBody) {
         std::string error;
         if (m_xml->init() == true) {
@@ -685,8 +692,13 @@ int Transaction::processRequestBody() {
             m_variableReqbodyError.set("0", m_variableOffset);
             m_variableReqbodyProcessorError.set("0", m_variableOffset);
         }
+#endif
 #if WITH_YAJL
+#ifdef WITH_LIBXML2
     } else if (m_requestBodyProcessor == JSONRequestBody) {
+#else
+    if (m_requestBodyProcessor == JSONRequestBody) {
+#endif
         std::string error;
         if (m_json->init() == true) {
             m_json->processChunk(m_requestBody.str().c_str(),
@@ -706,7 +718,11 @@ int Transaction::processRequestBody() {
             m_variableReqbodyProcessorError.set("0", m_variableOffset);
         }
 #endif
+#if defined(WITH_LIBXML2) or defined(WITH_YAJL)
     } else if (m_requestBodyType == MultiPartRequestBody) {
+#else
+    if (m_requestBodyType == MultiPartRequestBody) {
+#endif
         std::string error;
         if (a != NULL) {
             Multipart m(*a, this);
diff --git a/src/variables/xml.cc b/src/variables/xml.cc
index 985a3bcc..8531de16 100644
--- a/src/variables/xml.cc
+++ b/src/variables/xml.cc
@@ -21,11 +21,13 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
+#ifdef WITH_LIBXML2
 #include <libxml/xmlschemas.h>
 #include <libxml/xpath.h>
 #include <libxml/tree.h>
 #include <libxml/parser.h>
 #include <libxml/xpathInternals.h>
+#endif
 
 #include <iostream>
 #include <string>
@@ -44,6 +46,12 @@
 namespace modsecurity {
 namespace Variables {
 
+#ifndef WITH_LIBXML2
+void XML::evaluate(Transaction *t,
+    Rule *rule,
+    std::vector<const VariableValue *> *l) { }
+#else
+
 void XML::evaluate(Transaction *t,
     Rule *rule,
     std::vector<const VariableValue *> *l) {
@@ -138,6 +146,7 @@ void XML::evaluate(Transaction *t,
     xmlXPathFreeContext(xpathCtx);
 }
 
+#endif
 
 }  // namespace Variables
 }  // namespace modsecurity