diff --git a/tutorials/modules/incompressibleFluid/blockedChannel/system/generateAlphas b/tutorials/modules/incompressibleFluid/blockedChannel/system/generateAlphas
index d35089680f..fd2cc3cc3b 100644
--- a/tutorials/modules/incompressibleFluid/blockedChannel/system/generateAlphas
+++ b/tutorials/modules/incompressibleFluid/blockedChannel/system/generateAlphas
@@ -11,6 +11,11 @@ libs            ("libutilityFunctionObjects.so");
 
 name            generateAlpha;
 
+codeInclude
+#{
+    #include "volFields.H"
+#};
+
 codeWrite
 #{
     const dimensionedVector dx(dimless/dimLength, vector(1, 0, 0));