diff --git a/Bootup Logos/img2logo.py b/Bootup Logos/img2logo.py
index 54b8761..cdcaea3 100755
--- a/Bootup Logos/img2logo.py	
+++ b/Bootup Logos/img2logo.py	
@@ -238,10 +238,17 @@ def img2hex(
     deviceSettings = MiniwareSettings
     if isPinecil:
         deviceSettings = PinecilSettings
-    # Generate both possible outputs
-    output_name = output_filename_base + os.path.basename(input_filename)
+
+    # Split name from extension so we can mangle in the _L suffix for flipped images
+    split_name = os.path.splitext( os.path.basename(input_filename))
+
     if flip:
-        output_name +="_L"
+        base = split_name[0]
+        ext = split_name[1]
+        base =base+"_L"
+        split_name = [base,ext]
+    output_name = output_filename_base +split_name[0] +split_name[1]
+
     DFUOutput.writeFile(
         output_name + ".dfu",
         data,