diff --git a/configure.ac b/configure.ac
index 51e6118..58a60e6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -225,6 +225,7 @@ else
     AC_MSG_RESULT([${MYSQL_CFLAGS}])
     AC_SUBST(MYSQL_CFLAGS)
     AC_SUBST(MYSQL_LIBS)
+    AC_DEFINE([HAVE_MYSQL], 1, [Define to 1 if MySQL support is enabled])
 fi
 
 if test x${compile_python} = xyes; then