diff --git a/runtime/CMakeLists.txt b/runtime/CMakeLists.txt
index e10cc16d..daa36d88 100644
--- a/runtime/CMakeLists.txt
+++ b/runtime/CMakeLists.txt
@@ -103,7 +103,7 @@ if(D_VERSION EQUAL 2)
 	endif(NOT PATCH_EXE)
 endif(D_VERSION EQUAL 2)
 
-file(GLOB GC_D ${RUNTIME_GC_DIR}/*.d)
+file(GLOB_RECURSE GC_D ${RUNTIME_GC_DIR}/*.d)
 file(GLOB_RECURSE DCRT_D ${RUNTIME_DC_DIR}/*.d)
 file(GLOB DCRT_C ${RUNTIME_DC_DIR}/*.c)