diff --git a/src/fileFormats/ensight/file/ensightCase.C b/src/fileFormats/ensight/file/ensightCase.C
index 310c3bda734a69dd0b178b9600f6fdcb241bba56..dd97fa57052ea1df3e5a2ad5f4e68a65cfdf88e9 100644
--- a/src/fileFormats/ensight/file/ensightCase.C
+++ b/src/fileFormats/ensight/file/ensightCase.C
@@ -508,7 +508,7 @@ void Foam::ensightCase::write() const
     }
     if (tsCloud < 0)
     {
-        tsCloud = 1 + std::max(1, tsGeom);  // Next available timeset
+        tsCloud = 1 + std::max(label(1), tsGeom);  // Next available timeset
     }
 
     writeHeader();