diff --git a/build/Makefile b/build/Makefile
index cfb80e5705..ef8bd7b3a5 100644
--- a/build/Makefile
+++ b/build/Makefile
@@ -997,6 +997,8 @@ diff-directory:
 	else \
 		echo "Differences found."; \
 		echo "$$diff_output"; \
+		echo "\n\n>>> Error: Generated CRD code in pkg/$(DIRECTORY) is out of date. Please run 'make gen-crd-code' to regenerate it and commit the changes.\n\n"; \
+		exit 1; \
 	fi
 
 install-release: $(ensure-build-image)
diff --git a/build/includes/sdk.mk b/build/includes/sdk.mk
index 48aedf9164..d37d31da42 100644
--- a/build/includes/sdk.mk
+++ b/build/includes/sdk.mk
@@ -261,5 +261,6 @@ test-gen-all-sdk-grpc:
 		echo "$$diff_output"; \
 		echo "Changes in ../test/sdk:"; \
 		echo "$$diff_output_test_sdk"; \
+		echo "\n\n>>> Error: Generated SDK gRPC code is out of date. Please run 'make gen-all-sdk-grpc' to regenerate it and commit the changes.\n\n"; \
 		exit 1; \
 	fi