diff --git a/ChangeLog b/ChangeLog
index 7a4d091477..7a84ca10fb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Sep 10 17:52:25 2014  Koichi Sasada  <ko1@atdot.net>
+
+	* compile.c (rb_vm_addr2insn): rename to rb_vm_insn_addr2insn
+	  to clear what address.
+
 Wed Sep 10 16:22:26 2014  Koichi Sasada  <ko1@atdot.net>
 
 	* test/ruby/test_gc.rb: fix condition.
diff --git a/compile.c b/compile.c
index 9e3fac7f47..e121592d1e 100644
--- a/compile.c
+++ b/compile.c
@@ -581,16 +581,17 @@ rb_iseq_translate_threaded_code(rb_iseq_t *iseq)
 
 #if OPT_DIRECT_THREADED_CODE || OPT_CALL_THREADED_CODE
 static int
-rb_vm_addr2insn(const void *addr) /* cold path */
+rb_vm_insn_addr2insn(const void *addr) /* cold path */
 {
     int insn;
     const void * const *table = rb_vm_get_insns_address_table();
 
     for (insn = 0; insn < VM_INSTRUCTION_SIZE; insn++) {
-	if (table[insn] == addr)
+	if (table[insn] == addr) {
 	    return insn;
+	}
     }
-    rb_bug("rb_vm_addr2insn: invalid insn address: %p", addr);
+    rb_bug("rb_vm_insn_addr2insn: invalid insn address: %p", addr);
 }
 #endif
 
@@ -609,7 +610,7 @@ rb_iseq_original_iseq(rb_iseq_t *iseq) /* cold path */
 
 	for (i = 0; i < iseq->iseq_size; /* */ ) {
 	    const void *addr = (const void *)iseq->iseq[i];
-	    int insn = rb_vm_addr2insn(addr);
+	    const int insn = rb_vm_insn_addr2insn(addr);
 
 	    iseq->iseq[i] = insn;
 	    i += insn_len(insn);