diff --git a/include/SDL_endian.h b/include/SDL_endian.h
index 327fe1791..6fe37460f 100644
--- a/include/SDL_endian.h
+++ b/include/SDL_endian.h
@@ -68,7 +68,7 @@ static __inline__ Uint16 SDL_Swap16(Uint16 x)
 #elif defined(__GNUC__) && defined(__x86_64__)
 static __inline__ Uint16 SDL_Swap16(Uint16 x)
 {
-	__asm__("xchgb %b0,%h0" : "=Q" (x) :  "0" (x));
+	__asm__("xchgb %b0,%h0" : "=q" (x) :  "0" (x));
 	return x;
 }
 #elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))