diff --git a/app/src/cli.c b/app/src/cli.c
index b78c84fd..bc1aa2b5 100644
--- a/app/src/cli.c
+++ b/app/src/cli.c
@@ -1204,9 +1204,9 @@ parse_integer_arg(const char *s, long *out, bool accept_suffix, long min,
 }
 
 static size_t
-parse_integers_arg(const char *s, size_t max_items, long *out, long min,
-                   long max, const char *name) {
-    size_t count = sc_str_parse_integers(s, ':', max_items, out);
+parse_integers_arg(const char *s, const char sep, size_t max_items, long *out,
+                   long min, long max, const char *name) {
+    size_t count = sc_str_parse_integers(s, sep, max_items, out);
     if (!count) {
         LOGE("Could not parse %s: %s", name, s);
         return 0;
@@ -1362,7 +1362,7 @@ parse_window_dimension(const char *s, uint16_t *dimension) {
 static bool
 parse_port_range(const char *s, struct sc_port_range *port_range) {
     long values[2];
-    size_t count = parse_integers_arg(s, 2, values, 0, 0xFFFF, "port");
+    size_t count = parse_integers_arg(s, ':', 2, values, 0, 0xFFFF, "port");
     if (!count) {
         return false;
     }