diff --git a/CMakeLists.txt b/CMakeLists.txt
index 91aa11a..1827da4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -105,7 +105,7 @@ if (MSVC)
 endif()
 
 if (NOT WIN32 AND (CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX))
-   set(CMAKE_C_FLAGS "-fPIC")
+   add_definitions("-fPIC")
 endif()
 
 check_include_files (endian.h HAVE_ENDIAN_H)