diff --git a/src/bitcoin.c b/src/bitcoin.c
index ada453ff..4381270f 100644
--- a/src/bitcoin.c
+++ b/src/bitcoin.c
@@ -190,6 +190,7 @@ bool gen_gbtbase(connsock_t *cs, gbtbase_t *gbt)
 
 	ret = true;
 out:
+	json_decref(val);
 	return ret;
 }