diff --git a/allvars_nccl.h b/allvars_nccl.h
index 9de38451af5af0373805969e5e122858182227b1..225968efd31c13bfbb6dd2219d19ca1117819e2e 100755
--- a/allvars_nccl.h
+++ b/allvars_nccl.h
@@ -115,7 +115,7 @@ extern struct op
 extern struct meta
 {
 
-  uint   Nmeasures;
+  unsigned long   Nmeasures;
   unsigned long   Nvis;
   uint   Nweights;
   uint   freq_per_chan;