diff --git a/common/lognormexp.m b/common/lognormexp.m
index 10d9f95..8db9c78 100644
--- a/common/lognormexp.m
+++ b/common/lognormexp.m
@@ -7,4 +7,4 @@
     if isempty(dim), dim = 1; end
 end
 s = logsumexp(X,dim);
-Y = exp(X-s);
+Y = X-s;