diff --git a/profcheck/cmd/profcheck/main.go b/profcheck/cmd/profcheck/main.go
index 51c0e9e..14d6c37 100644
--- a/profcheck/cmd/profcheck/main.go
+++ b/profcheck/cmd/profcheck/main.go
@@ -54,6 +54,7 @@ func main() {
 
 	if err := (profcheck.ConformanceChecker{CheckDictionaryDuplicates: *checkDupes, CheckSampleTimestampShape: *checkSampleShapes}).Check(&data); err != nil {
 		fmt.Printf("%s: conformance checks failed: %v\n", inputPath, err)
+		os.Exit(1)
 	}
 	fmt.Printf("%s: conformance checks passed\n", inputPath)
 }