diff --git a/libobs/util/platform.c b/libobs/util/platform.c
index 907d5ed69..c80c80275 100644
--- a/libobs/util/platform.c
+++ b/libobs/util/platform.c
@@ -796,8 +796,11 @@ char *os_generate_formatted_filename(const char *extension, bool space,
 	if (!space)
 		dstr_replace(&sf, " ", "_");
 
-	dstr_cat_ch(&sf, '.');
-	dstr_cat(&sf, extension);
+	if (extension && *extension) {
+		dstr_cat_ch(&sf, '.');
+		dstr_cat(&sf, extension);
+	}
+
 	dstr_free(&c);
 
 	if (sf.len > 255)