diff --git a/applications/solvers/heatTransfer/chtMultiRegionFoam/createMeshesPostProcess.H b/applications/solvers/heatTransfer/chtMultiRegionFoam/createMeshesPostProcess.H
index 61d94eb5c..fdd22b722 100644
--- a/applications/solvers/heatTransfer/chtMultiRegionFoam/createMeshesPostProcess.H
+++ b/applications/solvers/heatTransfer/chtMultiRegionFoam/createMeshesPostProcess.H
@@ -1,2 +1,9 @@
 #include "createMeshes.H"
+
+if (!fluidRegions.size())
+{
+    FatalErrorIn(args.executable())
+        << "No fluid meshes present" << exit(FatalError);
+}
+
 fvMesh& mesh = fluidRegions[0];