diff --git a/.circleci/config.yml b/.circleci/config.yml
index 484d12e..679f6d1 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -274,6 +274,10 @@ jobs:
           name: staticcheck
           command: make staticcheck
           when: always
+      - run:
+          name: Check generate
+          command: make checkgenerate
+          when: always
 
   check-openapi:
     executor: linux-amd64
diff --git a/Makefile b/Makefile
index bde32f6..b5891d5 100644
--- a/Makefile
+++ b/Makefile
@@ -64,6 +64,9 @@ checktidy:
 checkopenapi:
 	./etc/checkopenapi.sh
 
+checkgenerate:
+	./etc/checkgenerate.sh
+
 staticcheck: $(SOURCES)
 	go run honnef.co/go/tools/cmd/staticcheck -go $(GOVERSION) ./...
 
diff --git a/etc/checkgenerate.sh b/etc/checkgenerate.sh
new file mode 100755
index 0000000..8c59794
--- /dev/null
+++ b/etc/checkgenerate.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+set -e
+
+function check_changes () {
+  changes="$(git status --porcelain=v1 2>/dev/null)"
+  if [ -n "$changes" ] ; then
+    echo $1
+    echo "$changes"
+    exit 1
+  fi
+}
+
+check_changes "git is dirty before running 'make generate-sources!'"
+make mock
+check_changes "git is dirty after running 'make generate-sources'!"