diff --git a/src/core/libraries/avplayer/avplayer_common.cpp b/src/core/libraries/avplayer/avplayer_common.cpp
index f42f690ed..4b42fc8c2 100644
--- a/src/core/libraries/avplayer/avplayer_common.cpp
+++ b/src/core/libraries/avplayer/avplayer_common.cpp
@@ -30,7 +30,15 @@ AvPlayerSourceType GetSourceType(std::string_view path) {
     }
 
     // schema://server.domain/path/to/file.ext/and/beyond -> .ext/and/beyond
-    auto ext = name.substr(name.rfind('.'));
+
+    // Find extension dot
+    auto dot_pos = name.rfind('.');
+    if (dot_pos == std::string_view::npos) {
+        return AvPlayerSourceType::Unknown;
+    }
+
+    // Extract extension (".ext/anything" or ".ext")
+    auto ext = name.substr(dot_pos);
     if (ext.empty()) {
         return AvPlayerSourceType::Unknown;
     }