diff --git a/mozilla/extensions/xmlextras/build/src/Makefile.in b/mozilla/extensions/xmlextras/build/src/Makefile.in
index 74c283168ed..f77806eb96c 100644
--- a/mozilla/extensions/xmlextras/build/src/Makefile.in
+++ b/mozilla/extensions/xmlextras/build/src/Makefile.in
@@ -40,7 +40,7 @@ SHARED_LIBRARY_LIBS = \
 
 ifdef MOZ_SOAP
 SHARED_LIBRARY_LIBS += $(DIST)/lib/libxmlextrassoap_s.$(LIB_SUFFIX)
-DEFINES = $(DEFINES) -DMOZ_SOAP
+DEFINES = -DMOZ_SOAP
 endif
 
 LOCAL_INCLUDES	= \