diff --git a/CMakeLists.txt b/CMakeLists.txt
index 48886af3..4e4e4404 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -445,13 +445,17 @@ IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" ST
 ENDIF ()
 
 IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
-    SET_PROPERTY (TARGET msgpackc APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+    IF (MSGPACK_ENABLE_SHARED)
+        SET_PROPERTY (TARGET msgpackc APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+    ENDIF ()
 ENDIF ()
 
 IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
     IF ((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER ${GNUCXX_NO_MISMATCHED_TAGS_SUPPORT_VERSION}) OR
         (CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL   ${GNUCXX_NO_MISMATCHED_TAGS_SUPPORT_VERSION}))
-    SET_PROPERTY (TARGET msgpackc APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+        IF (MSGPACK_ENABLE_SHARED)
+            SET_PROPERTY (TARGET msgpackc APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-mismatched-tags")
+        ENDIF ()
     ENDIF ()
 ENDIF ()