diff --git a/dlls/oleaut32/Makefile.in b/dlls/oleaut32/Makefile.in
index 52239f9c53..a1e6de6009 100644
--- a/dlls/oleaut32/Makefile.in
+++ b/dlls/oleaut32/Makefile.in
@@ -58,6 +58,10 @@ IDL_P_SRCS = \
 	oleaut32_oaidl.idl \
 	oleaut32_ocidl.idl
 
+IDL_R_SRCS = \
+	oleaut32_oaidl.idl \
+	oleaut32_ocidl.idl
+
 EXTRA_OBJS = dlldata.o
 
 @MAKE_DLL_RULES@