diff --git a/Makefile.am b/Makefile.am
index e4628aa2..fb9e07ee 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -112,7 +112,8 @@ EXTRA_DIST += \
 
 # CMake script
 EXTRA_DIST += \
-  CMakeLists.txt
+  CMakeLists.txt \
+  cmake/internal_utils.cmake
 
 # MSVC project files
 EXTRA_DIST += \