--- a/ORBit2/Makefile.shared
+++ b/ORBit2/Makefile.shared
@@ -15,8 +15,7 @@ IDL_COMPILER = @IDL_COMPILER@
 
 if MAINTAINER_MODE
 IDL_DEPS_MAGIC := $(shell mkdir .deps > /dev/null 2>&1 || :)
-IDL_DEP_FILES = $(IDL_FILES:%.idl=.deps/%.idl.P)
--include $(IDL_DEP_FILES)
+IDL_DEP_FILES = $(IDL_FILES:%.idl=.deps/%.idl.P) -include $(IDL_DEP_FILES)
 endif
 
 distclean-local: