diff --git a/srcpkgs/loudmouth/patches/fix-nonce_nul.patch b/srcpkgs/loudmouth/patches/fix-nonce_nul.patch
new file mode 100644
index 00000000000..853bf856d94
--- /dev/null
+++ b/srcpkgs/loudmouth/patches/fix-nonce_nul.patch
@@ -0,0 +1,11 @@
+--- loudmouth/lm-sasl.c	2016-02-13 12:16:45.000000000 +0100
++++ loudmouth/lm-sasl.c	2017-11-12 14:55:20.995838985 +0100
+@@ -529,7 +529,7 @@
+     }
+ 
+     nonce = g_hash_table_lookup (challenge, "nonce");
+-    if (nonce == NULL || nonce == '\0') {
++    if (nonce == NULL || *nonce == '\0') {
+         g_log (LM_LOG_DOMAIN, LM_LOG_LEVEL_SASL,
+                "%s: server didn't provide a nonce in the challenge",
+                G_STRFUNC);