diff --git a/CMakeLists.txt b/CMakeLists.txt
index 40d53f8b4..f33e03a5b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -60,11 +60,13 @@ else()
 
 	file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/amalgamate)
 
+  file(GLOB SRC_HEADER_FILES ${PROJECT_SOURCE_DIR}/include/*.h ${PROJECT_SOURCE_DIR}/include/crow/*.h)
+
 	add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/amalgamate/crow_all.h
 		COMMAND python ${PROJECT_SOURCE_DIR}/amalgamate/merge_all.py ${PROJECT_SOURCE_DIR}/include
 		COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_BINARY_DIR}/amalgamate/crow_all.h ${PROJECT_SOURCE_DIR}/amalgamate
 		WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/amalgamate
-		DEPENDS ${PROJECT_SOURCE_DIR}/include/*.h ${PROJECT_SOURCE_DIR}/include/crow/*.h
+		DEPENDS ${SRC_HEADER_FILES}
 	)
 
 	add_custom_target(amalgamation ALL DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/amalgamate/crow_all.h)