diff --git a/clang/lib/Analysis/UnsafeBufferUsage.cpp b/clang/lib/Analysis/UnsafeBufferUsage.cpp
index 781dc13c898d2..d0451401dc305 100644
--- a/clang/lib/Analysis/UnsafeBufferUsage.cpp
+++ b/clang/lib/Analysis/UnsafeBufferUsage.cpp
@@ -322,6 +322,7 @@ class Gadget {
 #define GADGET(x) case Kind::x: return #x;
 #include "clang/Analysis/Analyses/UnsafeBufferUsageGadgets.def"
     }
+    llvm_unreachable("Unhandled Gadget::Kind enum");
   }
 #endif