diff --git a/litex_boards/targets/lambdaconcept_ecpix5.py b/litex_boards/targets/lambdaconcept_ecpix5.py
index 92f4155..21ca026 100755
--- a/litex_boards/targets/lambdaconcept_ecpix5.py
+++ b/litex_boards/targets/lambdaconcept_ecpix5.py
@@ -262,7 +262,7 @@ def main():
 
     if args.flash:
         prog = soc.platform.create_programmer()
-        prog.flash(None, builder.get_bitstream_filename(mode="flash"))
+        prog.flash(None, builder.get_bitstream_filename(mode="flash", ext=".svf")) # FIXME
 
 if __name__ == "__main__":
     main()