diff --git a/lib/libimhex/CMakeLists.txt b/lib/libimhex/CMakeLists.txt
index 731555855..86d56c240 100644
--- a/lib/libimhex/CMakeLists.txt
+++ b/lib/libimhex/CMakeLists.txt
@@ -49,7 +49,7 @@ if (APPLE)
         endif ()
     endif ()
 
-    set(LIBIMHEX_SOURCES ${LIBIMHEX_SOURCES} source/helpers/utils_macos.m)
+    set(LIBIMHEX_SOURCES ${LIBIMHEX_SOURCES} source/helpers/utils_macos.mm)
 endif ()
 
 add_compile_definitions(IMHEX_PROJECT_NAME="${PROJECT_NAME}")