diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 171a48026bf..38fea4efc9f 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -8241,7 +8241,10 @@ standard_sse_constant_opcode (rtx insn, rtx x)
 	}
 
     case 2:
-      return "%vpcmpeqd\t%0, %0, %0";
+      if (TARGET_AVX)
+	return "vpcmpeqd\t%0, %0, %0";
+      else
+	return "pcmpeqd\t%0, %0";
 
     default:
       break;