diff --git a/include/spdlog/details/os-inl.h b/include/spdlog/details/os-inl.h
index a701e13f..33f15435 100644
--- a/include/spdlog/details/os-inl.h
+++ b/include/spdlog/details/os-inl.h
@@ -246,7 +246,6 @@ SPDLOG_INLINE size_t filesize(FILE *f)
 #endif
 #endif
     throw_spdlog_ex("Failed getting file size from fd", errno);
-    return 0; // will not be reached.
 }
 
 // Return utc offset in minutes or throw spdlog_ex on failure