1 files changed, 1 insertions, 1 deletions

diff --git a/mps/code/poolabs.c b/mps/code/poolabs.c
index 324975cb7c0..80b7f5323be 100644
--- a/mps/code/poolabs.c
+++ b/mps/code/poolabs.c
@@ -621,7 +621,7 @@ Res PoolTrivFramePop(Pool pool, Buffer buf, AllocFrame frame)
 
 
 void PoolNoWalk(Pool pool, Seg seg,
-                FormattedObjectsStepMethod f, void *p, Size s)
+                FormattedObjectsStepMethod f, void *p, size_t s)
 {
   AVERT(Pool, pool);
   AVERT(Seg, seg);