diff --git a/unit/CMakeLists.txt b/unit/CMakeLists.txt
index 9afc9573..b3cc8cea 100644
--- a/unit/CMakeLists.txt
+++ b/unit/CMakeLists.txt
@@ -25,7 +25,7 @@ if(CXX_WUNUSED_VARIABLE)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unused-variable")
 endif()
 
-add_library(gtest ${gtest_SOURCES})
+add_library(gtest STATIC ${gtest_SOURCES})
 
 add_definitions(-DGTEST_HAS_PTHREAD=0 -DSRCDIR=${PROJECT_SOURCE_DIR})
 
diff --git a/util/CMakeLists.txt b/util/CMakeLists.txt
index c664ec25..dc731322 100644
--- a/util/CMakeLists.txt
+++ b/util/CMakeLists.txt
@@ -16,7 +16,7 @@ set(expressionutil_SRCS
     ExpressionParser.h
     ExpressionParser.cpp
     )
-add_library(expressionutil ${expressionutil_SRCS})
+add_library(expressionutil STATIC ${expressionutil_SRCS})
 add_dependencies(expressionutil ragel_ExpressionParser)
 
 SET(corpusomatic_SRCS
@@ -29,5 +29,5 @@ SET(corpusomatic_SRCS
     ng_find_matches.h
     ng_find_matches.cpp
 )
-add_library(corpusomatic ${corpusomatic_SRCS})
+add_library(corpusomatic STATIC ${corpusomatic_SRCS})