--- a/jdk/make/common/Demo.gmk	Wed Jul 05 18:26:11 2017 +0200
+++ b/jdk/make/common/Demo.gmk	Tue Oct 23 10:10:23 2012 -0700
@@ -292,9 +292,9 @@
 
 ifeq ($(PLATFORM),windows)
 # JDK name required here
-RC_FLAGS += /D "JDK_FNAME=$(LIBRARY).dll" \
-            /D "JDK_INTERNAL_NAME=$(LIBRARY)" \
-            /D "JDK_FTYPE=0x2L"
+RC_FLAGS += -D "JDK_FNAME=$(LIBRARY).dll" \
+            -D "JDK_INTERNAL_NAME=$(LIBRARY)" \
+            -D "JDK_FTYPE=0x2L"
 endif
 
 # Native library building