diff --git a/servers/slapd/sasl.c b/servers/slapd/sasl.c
index d714a5f455..e266b0e406 100644
--- a/servers/slapd/sasl.c
+++ b/servers/slapd/sasl.c
@@ -608,7 +608,7 @@ slap_auxprop_init(
 	sasl_auxprop_plug_t **plug,
 	const char *plugname)
 {
-	if ( !out_version | !plug ) return SASL_BADPARAM;
+	if ( !out_version || !plug ) return SASL_BADPARAM;
 
 	if ( max_version < SASL_AUXPROP_PLUG_VERSION ) return SASL_BADVERS;