diff --git a/lib/krb5/Makefile.am b/lib/krb5/Makefile.am
index 058472948..c87d7a14f 100644
--- a/lib/krb5/Makefile.am
+++ b/lib/krb5/Makefile.am
@@ -127,10 +127,10 @@ libkrb5_la_LDFLAGS = -version-info 18:3:1
 
 $(libkrb5_la_OBJECTS): $(srcdir)/krb5-protos.h $(srcdir)/krb5-private.h
 
-$(srcdir)/krb5-protos.h:
+$(srcdir)/krb5-protos.h: $(ERR_FILES)
 	cd $(srcdir); perl ../../cf/make-proto.pl -q -P comment -o krb5-protos.h $(libkrb5_la_SOURCES) || rm -f krb5-protos.h
 
-$(srcdir)/krb5-private.h:
+$(srcdir)/krb5-private.h: $(ERR_FILES)
 	cd $(srcdir); perl ../../cf/make-proto.pl -q -P comment -p krb5-private.h $(libkrb5_la_SOURCES) || rm -f krb5-private.h
 
 #libkrb5_la_LIBADD = ../com_err/error.lo ../com_err/com_err.lo