diff --git a/src/nfa/nfa_api_queue.h b/src/nfa/nfa_api_queue.h
index 1373425d..59c18fca 100644
--- a/src/nfa/nfa_api_queue.h
+++ b/src/nfa/nfa_api_queue.h
@@ -91,6 +91,7 @@ struct mq {
                         * history buffer; (logically) immediately before the
                         * main buffer */
     size_t hlength; /**< length of the history buffer */
+    struct hs_scratch *scratch; /**< global scratch space */
     char report_current; /**<
                           * report_current matches at starting offset through
                           * callback. If true, the queue must be located at a
diff --git a/src/scratch.c b/src/scratch.c
index d8742e7d..dae2c672 100644
--- a/src/scratch.c
+++ b/src/scratch.c
@@ -227,6 +227,11 @@ hs_error_t alloc_scratch(const hs_scratch_t *proto, hs_scratch_t **scratch) {
     // Don't get too big for your boots
     assert((size_t)(current - (char *)s) <= alloc_size);
 
+    // Init q->scratch ptr for every queue.
+    for (struct mq *qi = s->queues; qi != s->queues + queueCount; ++qi) {
+        qi->scratch = s;
+    }
+
     return HS_SUCCESS;
 }
 
diff --git a/unit/internal/lbr.cpp b/unit/internal/lbr.cpp
index 2bb359df..f335e184 100644
--- a/unit/internal/lbr.cpp
+++ b/unit/internal/lbr.cpp
@@ -122,6 +122,7 @@ protected:
         q.length = 0; // filled in by test
         q.history = nullptr;
         q.hlength = 0;
+        q.scratch = nullptr; // not needed by LBR
         q.report_current = 0;
         q.cb = onMatch;
         q.som_cb = nullptr; // only used by Haig
diff --git a/unit/internal/limex_nfa.cpp b/unit/internal/limex_nfa.cpp
index 91ab09db..9d3c00b5 100644
--- a/unit/internal/limex_nfa.cpp
+++ b/unit/internal/limex_nfa.cpp
@@ -102,6 +102,7 @@ protected:
         q.length = SCAN_DATA.size();
         q.history = nullptr;
         q.hlength = 0;
+        q.scratch = nullptr; /* limex does not use scratch */
         q.report_current = 0;
         q.cb = onMatch;
         q.som_cb = nullptr; // only used by Haig
@@ -396,6 +397,7 @@ protected:
         q.length = ZOMBIE_SCAN_DATA.length();
         q.history = nullptr;
         q.hlength = 0;
+        q.scratch = nullptr; /* limex does not use scratch */
         q.report_current = 0;
         q.cb = onMatch;
         q.som_cb = nullptr; // only used by Haig