diff --git a/doc.go b/doc.go
index c107f82..aeb207e 100644
--- a/doc.go
+++ b/doc.go
@@ -56,7 +56,7 @@
 //	PermissionDenied        403           Access denied
 //	Unauthenticated         401           Authentication required
 //	ResourceExhausted       429           Rate limit exceeded
-//	FailedPrecondition      422           Precondition failed
+//	FailedPrecondition      400           Precondition failed
 //	Aborted                 409           Operation aborted
 //	OutOfRange              400           Value out of range
 //	Unimplemented           501           Not implemented
diff --git a/error.go b/error.go
index 3262826..f6f9860 100644
--- a/error.go
+++ b/error.go
@@ -253,7 +253,7 @@ func (c Code) HttpStatusCode() int {
 	case CodeResourceExhausted:
 		return 429
 	case CodeFailedPrecondition:
-		return 422
+		return 400
 	case CodeAborted:
 		return 409
 	case CodeOutOfRange:
diff --git a/error_test.go b/error_test.go
index 8778fa4..569e220 100644
--- a/error_test.go
+++ b/error_test.go
@@ -596,7 +596,7 @@ func TestHTTPCodesMatchADR(t *testing.T) {
 		{trogonerror.CodePermissionDenied, 403, "PERMISSION_DENIED"},
 		{trogonerror.CodeUnauthenticated, 401, "UNAUTHENTICATED"},
 		{trogonerror.CodeResourceExhausted, 429, "RESOURCE_EXHAUSTED"},
-		{trogonerror.CodeFailedPrecondition, 422, "FAILED_PRECONDITION"},
+		{trogonerror.CodeFailedPrecondition, 400, "FAILED_PRECONDITION"},
 		{trogonerror.CodeAborted, 409, "ABORTED"},
 		{trogonerror.CodeOutOfRange, 400, "OUT_OF_RANGE"},
 		{trogonerror.CodeUnimplemented, 501, "UNIMPLEMENTED"},