diff --git a/src/groups.py b/src/groups.py
index 3b359a2..7f6cd2f 100644
--- a/src/groups.py
+++ b/src/groups.py
@@ -107,7 +107,7 @@ for group in list(groups.keys()):
       declar_loop = declar_loop[:-1]
       for k,d in enumerate(dims):
         dims_loop += "  dims("+str(k+1)+") = "+str(d)+"\n"
-        dims_loop_py += "    dims["+str(k)+"] = "+str(d)+"\n"
+        dims_loop_py += "    dims["+str(k)+"] = int("+str(d)+")\n"
       for k,d in enumerate(dims):
         copy_loop += k*" "+"  do i"+str(k+1)+"=1,"+str(d)+'\n'
       copy_loop += (k+1)*" "+"  %(var)s ("