diff --git a/mozilla/tools/trace-malloc/Makefile.in b/mozilla/tools/trace-malloc/Makefile.in
index 572b1a6d10d..b0dc5ee2f0d 100644
--- a/mozilla/tools/trace-malloc/Makefile.in
+++ b/mozilla/tools/trace-malloc/Makefile.in
@@ -78,6 +78,7 @@ DEFINES		+= \
 endif
 
 EXTRA_DEPS      = tmreader.$(OBJ_SUFFIX)
+GARBAGE		+= tmreader.$(OBJ_SUFFIX)
 
 include $(topsrcdir)/config/rules.mk