diff --git a/src/stats.h b/src/stats.h
index 83f5151dc..cad01f975 100644
--- a/src/stats.h
+++ b/src/stats.h
@@ -130,8 +130,8 @@ inline volatile unsigned long long rdtsc()
 	if (CPU.bRDTSC)
 #endif
 	{
-		register unsigned volatile long long tsc asm("eax");
-		asm volatile ("\trdtsc\n" : : : "eax", "edx");
+		register unsigned volatile long long tsc;
+		asm volatile ("\trdtsc\n" : "=A" (tsc));
 		return tsc;
 	}
 	return 0;