diff --git a/Core/Loaders.h b/Core/Loaders.h
index 05837433f8..f0e83adab4 100644
--- a/Core/Loaders.h
+++ b/Core/Loaders.h
@@ -110,6 +110,7 @@ IdentifiedFileType Identify_File(FileLoader *fileLoader);
 
 class FileLoaderFactory {
 public:
+	virtual ~FileLoaderFactory() {}
 	virtual FileLoader *ConstructFileLoader(const std::string &filename) = 0;
 };
 void RegisterFileLoaderFactory(std::string name, std::unique_ptr<FileLoaderFactory> factory);
diff --git a/ext/native/thin3d/thin3d.cpp b/ext/native/thin3d/thin3d.cpp
index 6f4eafb3bf..965c88dc0b 100644
--- a/ext/native/thin3d/thin3d.cpp
+++ b/ext/native/thin3d/thin3d.cpp
@@ -409,7 +409,7 @@ void ConvertFromRGBA8888(uint8_t *dst, const uint8_t *src, uint32_t dstStride, u
 		case Draw::DataFormat::R8G8B8A8_UNORM:
 		case Draw::DataFormat::UNDEFINED:
 		default:
-			WARN_LOG_REPORT_ONCE(convFromRGBA, G3D, "Unable to convert from format: %d", format);
+			WARN_LOG_REPORT_ONCE(convFromRGBA, G3D, "Unable to convert from format: %d", (int)format);
 			break;
 		}
 	}