diff --git a/modules/acore/cmake/compiler/gcc/settings.cmake b/modules/acore/cmake/compiler/gcc/settings.cmake
index bd6df376f..bd3437dac 100644
--- a/modules/acore/cmake/compiler/gcc/settings.cmake
+++ b/modules/acore/cmake/compiler/gcc/settings.cmake
@@ -10,8 +10,8 @@ endif()
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
 message(STATUS "GCC: Enabled c++11 support")
 
-#set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99")
-#message(STATUS "GCC: Enabled C99 support")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99")
+message(STATUS "GCC: Enabled C99 support")
 
 if(PLATFORM EQUAL 32)
   # Required on 32-bit systems to enable SSE2 (standard on x64)