diff --git a/meta/recipes-support/gmp/gmp_4.2.1.bb b/meta/recipes-support/gmp/gmp_4.2.1.bb
index 74da6b8..5f3929f 100644
--- a/meta/recipes-support/gmp/gmp_4.2.1.bb
+++ b/meta/recipes-support/gmp/gmp_4.2.1.bb
@@ -11,4 +11,7 @@ PR = "r0"
 SRC_URI = "${GNU_MIRROR}/gmp/${BP}.tar.bz2 \
            file://disable-stdc.patch"
 
+SRC_URI[md5sum] = "091c56e0e1cca6b09b17b69d47ef18e3"
+SRC_URI[sha256sum] = "d07ffcb37eecec35c5ec72516d10b35fdf6e6fef1fcf1dcd37e30b8cbf8bf941"
+
 inherit autotools