diff --git a/leafres/testrun/Makefile b/leafres/testrun/Makefile
index b6149a8..189af25 100644
--- a/leafres/testrun/Makefile
+++ b/leafres/testrun/Makefile
@@ -6,7 +6,7 @@ ALL   = piscal
 # compiler options
 FF    = mpif90
 #FOPTS = -g -C
-FOPTS = -g
+FOPTS = -g -fallow-argument-mismatch
 
 #Base directory
 BASEDIR = ../..