diff --git a/servers/slapd/main.c b/servers/slapd/main.c
index 53398e9993..e70186bb70 100644
--- a/servers/slapd/main.c
+++ b/servers/slapd/main.c
@@ -226,6 +226,7 @@ int main( int argc, char **argv )
 			     )) != EOF ) {
 		switch ( i ) {
 		case 'h':	/* listen URLs */
+			if ( urls != NULL ) free( urls );
 			urls = ch_strdup( optarg );
             break;