diff --git a/common.mk b/common.mk
index 6b9eacd100..9c8370c0da 100644
--- a/common.mk
+++ b/common.mk
@@ -1637,6 +1637,7 @@ enum.$(OBJEXT): {$(VPATH)}onigmo.h
 enum.$(OBJEXT): {$(VPATH)}oniguruma.h
 enum.$(OBJEXT): {$(VPATH)}st.h
 enum.$(OBJEXT): {$(VPATH)}subst.h
+enum.$(OBJEXT): {$(VPATH)}symbol.h
 enum.$(OBJEXT): {$(VPATH)}util.h
 enumerator.$(OBJEXT): $(hdrdir)/ruby/ruby.h
 enumerator.$(OBJEXT): $(top_srcdir)/include/ruby.h
diff --git a/enum.c b/enum.c
index 5a27f55864..4613ab733c 100644
--- a/enum.c
+++ b/enum.c
@@ -12,6 +12,7 @@
 #include "internal.h"
 #include "ruby/util.h"
 #include "id.h"
+#include "symbol.h"
 
 #include <assert.h>
 
@@ -2644,7 +2645,7 @@ enum_zip(int argc, VALUE *argv, VALUE obj)
 	argv[i] = ary;
     }
     if (!allary) {
-	const VALUE sym_each = ID2SYM(id_each);
+	static const VALUE sym_each = STATIC_ID2SYM(id_each);
 	CONST_ID(conv, "to_enum");
 	for (i=0; i<argc; i++) {
 	    if (!rb_respond_to(argv[i], id_each)) {