diff --git a/utils/TableGen/CodeGenRegisters.cpp b/utils/TableGen/CodeGenRegisters.cpp
index 3284ba46a44..f89ba9ea5b2 100644
--- a/utils/TableGen/CodeGenRegisters.cpp
+++ b/utils/TableGen/CodeGenRegisters.cpp
@@ -1783,6 +1783,7 @@ void CodeGenRegBank::computeRegUnitLaneMasks() {
           }
           ++u;
         }
+        (void)Found;
         assert(Found);
       }
     }