diff --git a/xpcom/reflect/xptcall/src/md/os2/Makefile.in b/xpcom/reflect/xptcall/src/md/os2/Makefile.in
index 4472f7f2a60..ebe8fe09d0c 100644
--- a/xpcom/reflect/xptcall/src/md/os2/Makefile.in
+++ b/xpcom/reflect/xptcall/src/md/os2/Makefile.in
@@ -43,7 +43,7 @@ override NO_STATIC_LIB=
 
 include $(topsrcdir)/config/rules.mk
 
-DEFINES		+= -DEXPORT_XPC_API -DDEBUG
+DEFINES		+= -DEXPORT_XPC_API
 
 INCLUDES	+= -I$(srcdir)/../..