diff --git a/src/waLBerlaDefinitions.in.h b/src/waLBerlaDefinitions.in.h
index 26b6627685ab451ae693fb32f8af4dfe0080d8aa..563ec863a1c6694b69dab1efd3b5cca2253aaac7 100644
--- a/src/waLBerlaDefinitions.in.h
+++ b/src/waLBerlaDefinitions.in.h
@@ -31,6 +31,8 @@
 
 #cmakedefine WALBERLA_BUILD_WITH_CUDA
 
+#cmakedefine WALBERLA_BUILD_WITH_CODEGEN
+
 #cmakedefine WALBERLA_BUFFER_DEBUG
 
 #cmakedefine WALBERLA_THREAD_SAFE_LOGGING