diff --git a/krita/image/CMakeLists.txt b/krita/image/CMakeLists.txt
index 6ff0b55feeb20867655b160af2885ec81d27a851..912fb5225f7e90d2e0b2b500a12aeb6429a98d34 100644
--- a/krita/image/CMakeLists.txt
+++ b/krita/image/CMakeLists.txt
@@ -273,8 +273,6 @@ set(einspline_SRCS
    bsplines/einspline/nugrid.cpp
 )
 
-SET_SOURCE_FILES_PROPERTIES(${einspline_SRCS} PROPERTIES COMPILE_FLAGS -std=c99)
-
 kde4_add_library(kritaimage SHARED ${kritaimage_LIB_SRCS} ${einspline_SRCS})
 
 target_link_libraries(kritaimage ${KDE4_KDEUI_LIBS} pigmentcms kundo2 kowidgetutils)