diff --git a/configure.in b/configure.in
index 0511eab80..506a385f8 100644
--- a/configure.in
+++ b/configure.in
@@ -2361,6 +2361,9 @@ AC_HELP_STRING([--enable-render-d3d], [enable the Direct3D render driver [[defau
         CheckPTHREAD
         CheckAltivec
 
+        # Good optimization on Mac OS X, yes...
+        EXTRA_CFLAGS="$EXTRA_CFLAGS -falign-loops=16"
+
         # Need this or things might misbuild on a G3.
         EXTRA_CFLAGS="$EXTRA_CFLAGS -force_cpusubtype_ALL"