diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b706b7d686..beb39bdb67 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -140,7 +140,7 @@ if(MSVC)
 endif()
 
 set_target_properties("${SM_EXE_NAME}" PROPERTIES
-  COMPILE_FLAGS ${SM_COMPILE_FLAGS}
+  COMPILE_FLAGS "${SM_COMPILE_FLAGS}"
 )
 
 set_target_properties("${SM_EXE_NAME}" PROPERTIES