diff --git a/script/valgrind.supp b/script/valgrind.supp
index 147c659ff..8459a71ad 100644
--- a/script/valgrind.supp
+++ b/script/valgrind.supp
@@ -123,6 +123,15 @@
 	...
 }
 
+{
+	ignore-libssh2-rsa-sha1-sign
+	Memcheck:Leak
+	...
+	obj:*libgcrypt.so*
+	fun:_libssh2_rsa_sha1_sign
+	...
+}
+
 {
 	ignore-libssh2-kexinit
 	Memcheck:Leak