diff --git a/CMakeLists.txt b/CMakeLists.txt
index f5a9c75..4233be1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,9 +22,9 @@ endif (IMGUI_STATIC)
 
 target_compile_definitions(cimgui PUBLIC IMGUI_DISABLE_OBSOLETE_FUNCTIONS=1)
 if (WIN32)
-    target_compile_definitions(cimgui PUBLIC IMGUI_IMPL_API="extern \"C\" __declspec\(dllexport\)")
+    target_compile_definitions(cimgui PUBLIC IMGUI_IMPL_API=extern\t\"C\"\t__declspec\(dllexport\))
 else (WIN32)
-    target_compile_definitions(cimgui PUBLIC IMGUI_IMPL_API="extern \"C\" ")
+    target_compile_definitions(cimgui PUBLIC IMGUI_IMPL_API=extern\t\"C\"\t)
 endif (WIN32)
 
 target_include_directories(cimgui PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})