diff --git a/pyPhotoAlbum/models.py b/pyPhotoAlbum/models.py
index 13450b4..b5acf21 100644
--- a/pyPhotoAlbum/models.py
+++ b/pyPhotoAlbum/models.py
@@ -354,6 +354,10 @@ class ImageData(BaseLayoutElement):
             logger.debug(f"ImageData: Creating texture for {self.image_path} (GL version: {gl_version})")
             pil_image = self._pending_pil_image
 
+            # Ensure RGBA format for GL_RGBA texture (defensive check)
+            if pil_image.mode != 'RGBA':
+                pil_image = pil_image.convert('RGBA')
+
             # Delete old texture if it exists
             if hasattr(self, '_texture_id') and self._texture_id:
                 glDeleteTextures([self._texture_id])