diff --git a/payload_consumer/payload_constants.cc b/payload_consumer/payload_constants.cc
index 663ab81..d62a0ec 100644
--- a/payload_consumer/payload_constants.cc
+++ b/payload_consumer/payload_constants.cc
@@ -66,6 +66,10 @@
       return "PUFFDIFF";
     case InstallOperation::BROTLI_BSDIFF:
       return "BROTLI_BSDIFF";
+
+    case InstallOperation::BSDIFF:
+    case InstallOperation::MOVE:
+      NOTREACHED();
   }
   return "<unknown_op>";
 }
diff --git a/payload_generator/payload_generation_config.cc b/payload_generator/payload_generation_config.cc
index 7f853d8..ef2f240 100644
--- a/payload_generator/payload_generation_config.cc
+++ b/payload_generator/payload_generation_config.cc
@@ -258,6 +258,10 @@
 
     case InstallOperation::PUFFDIFF:
       return minor >= kPuffdiffMinorPayloadVersion;
+
+    case InstallOperation::MOVE:
+    case InstallOperation::BSDIFF:
+      NOTREACHED();
   }
   return false;
 }