diff --git a/runtime/CMakeLists.txt b/runtime/CMakeLists.txt
index c9643d11..1df5b752 100644
--- a/runtime/CMakeLists.txt
+++ b/runtime/CMakeLists.txt
@@ -120,7 +120,7 @@ macro(dc INPUT_D OUTLIST_O OUTLIST_BC OUTDIR INCDIR MOREFLAGS)
 		OUTPUT
 			${OUTPUT_O}
 			${OUTPUT_BC}
-		COMMAND ${LDC_LOC} -c -I${INCDIR} -output-bc ${INPUT_D} -of${OUTPUT_O} ${D_FLAGS} ${MOREFLAGS}
+		COMMAND ${LDC_LOC} -c -I${INCDIR} -I${RUNTIME_GC_DIR} -output-bc ${INPUT_D} -of${OUTPUT_O} ${D_FLAGS} ${MOREFLAGS}
 		DEPENDS ${LDC_LOC}
 			${INPUT_D}
 			${LDC_IMPORTS}