diff --git a/src/pipewire/conf.c b/src/pipewire/conf.c
index c29d45648..f6dd56847 100644
--- a/src/pipewire/conf.c
+++ b/src/pipewire/conf.c
@@ -919,7 +919,7 @@ static char **pw_strv_insert_at(char **strv, int len, int pos, const char *str)
 			len++;
 	}
 	if (pos < 0 || pos > len)
-		pos = len+1;
+		pos = len;
 
 	n = realloc(strv, sizeof(char*) * (len + 2));
 	if (n == NULL) {