diff --git a/config/ax_ext.m4 b/config/ax_sse.m4
similarity index 93%
rename from config/ax_ext.m4
rename to config/ax_sse.m4
index 4883b89..ed4d223 100644
--- a/config/ax_ext.m4
+++ b/config/ax_sse.m4
@@ -37,7 +37,7 @@
 
 #serial 12
 
-AC_DEFUN([AX_EXT],
+AC_DEFUN([AX_SSE],
 [
   AC_REQUIRE([AC_CANONICAL_HOST])
 
@@ -53,16 +53,20 @@
       if test x"$ax_cv_support_sse3_ext" = x"yes"; then
         SIMD_FLAGS="$SIMD_FLAGS -msse3"
         AC_DEFINE(HAVE_SSE3,,[Support SSE3 (Streaming SIMD Extensions 3) instructions])
+	AM_CONDITIONAL(HAVE_SSE3, true)
       else
         AC_MSG_WARN([Your compiler does not support sse3 instructions, can you try another compiler?])
+	AM_CONDITIONAL(HAVE_SSE3, false)
       fi
 
       AX_CHECK_COMPILE_FLAG(-msse4.1, ax_cv_support_sse41_ext=yes, [])
       if test x"$ax_cv_support_sse41_ext" = x"yes"; then
         SIMD_FLAGS="$SIMD_FLAGS -msse4.1"
         AC_DEFINE(HAVE_SSE4_1,,[Support SSE4.1 (Streaming SIMD Extensions 4.1) instructions])
+	AM_CONDITIONAL(HAVE_SSE4_1, true)
       else
         AC_MSG_WARN([Your compiler does not support sse4.1 instructions, can you try another compiler?])
+	AM_CONDITIONAL(HAVE_SSE4_1, false)
       fi
   ;;
   esac