diff --git a/ChangeLog b/ChangeLog
index a5a6c9c80..38246a7da 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2005-10-20  Donnie Berkholz  <spyderous@gentoo.org>
+
+	* configure.ac: Bug #4817 <https://bugs.freedesktop.org/show_bug.cgi?id=4817>
+	Restore '=' to '==' in test for mmx_capable.
+
 2005-10-18  Adam Jackson  <ajax@freedesktop.org>
 
 	* XTrap/Makefile.am:
diff --git a/configure.ac b/configure.ac
index 5c60bb586..42865266e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -256,7 +256,7 @@ esac
 AC_MSG_CHECKING(for MMX capable platform)
 if test "x$use_x86_asm" = xyes && test "x$GCC" = xyes ; then
 	AC_PREPROC_IFELSE([
-#if (!defined (__GNUC__) || __GNUC__ < 3 || (__GNUC__ = 3 && __GNUC_MINOR__ < 4))
+#if (!defined (__GNUC__) || __GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4))
     #error Not supported
 #endif
 ], mmx_capable=yes, mmx_capable=no)