diff --git a/ChangeLog b/ChangeLog
index d8973deb51..78b4aa13c1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Sat Apr 27 19:04:55 2013  Tanaka Akira  <akr@fsij.org>
+
+	* sparc.c: Use __asm__ instead of asm for gcc.
+	  gcc doesn't provide asm keyword if -ansi option is given.
+	  http://gcc.gnu.org/onlinedocs/gcc/Alternate-Keywords.html
+
 Sat Apr 27 17:22:50 2013  Tanaka Akira  <akr@fsij.org>
 
 	* ext/socket/extconf.rb: Redundant test removed.
diff --git a/sparc.c b/sparc.c
index 5c5dc8ef8e..dc3779035f 100644
--- a/sparc.c
+++ b/sparc.c
@@ -12,7 +12,16 @@
 void
 rb_sparc_flush_register_windows(void)
 {
-    asm
+/*
+ * gcc doesn't provide "asm" keyword if -ansi and the various -std options
+ * are given.
+ * http://gcc.gnu.org/onlinedocs/gcc/Alternate-Keywords.html
+ */
+#ifndef __GNUC__
+#define __asm__ asm
+#endif
+
+    __asm__
 #ifdef __GNUC__
     __volatile__
 #endif