diff --git a/Makefile.pre.in b/Makefile.pre.in
index 70260a7..9ad1c0a 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -197,6 +197,7 @@
 PARSER_OBJS=	$(POBJS) Parser/myreadline.o
 
 PGOBJS=		\
+		Objects/obmalloc.o \
 		Python/mysnprintf.o \
 		Parser/firstsets.o \
 		Parser/grammar.o \