diff --git a/compile_php.sh b/compile_php.sh
index a5f770d05..3069d4d9d 100644
--- a/compile_php.sh
+++ b/compile_php.sh
@@ -3,7 +3,7 @@ COMPILER_VERSION="0.7"
 PHP_VERSION="5.4.11"
 ZEND_VM="GOTO"
 ZLIB_VERSION="1.2.7"
-GMP_VERSION="5.1.0"
+GMP_VERSION="5.1.0a"
 PTHREADS_VERSION="e4700122a89bf759a9c3a024bda0c7d025bcb93d"
 CURL_VERSION="curl-7_28_1"
 #READLINE_VERSION="6.2"