diff --git a/src/utilities/missing/isint/isint.m b/src/utilities/missing/isint/isint.m
index 8c170f3916934e93f8746fcb27e2431ab872a41d..6d274846d9934aed3600a152b9e0710285794ac8 100644
--- a/src/utilities/missing/isint/isint.m
+++ b/src/utilities/missing/isint/isint.m
@@ -29,7 +29,7 @@ function [l,c,d] = isint(a)
 % along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
 
 if ~isnumeric(a)
-    b = false;
+    l = false;
     if nargout>1
         c = [];
         d = [];