diff --git a/lib/Arch/X86/Semantics/BMI.cpp b/lib/Arch/X86/Semantics/BMI.cpp
index c8aafd93..2d2c108d 100644
--- a/lib/Arch/X86/Semantics/BMI.cpp
+++ b/lib/Arch/X86/Semantics/BMI.cpp
@@ -110,6 +110,8 @@ DEF_SEM(TZCNT, D dst, S src) {
   return memory;
 }
 
+}  // namespace
+
 DEF_ISEL(ANDN_VGPR32d_VGPR32d_VGPR32d) = ANDN<R32W, R32, R32>;
 DEF_ISEL(ANDN_VGPR32d_VGPR32d_MEMd) = ANDN<R32W, R32, M32>;
 IF_64BIT(DEF_ISEL(ANDN_VGPR64q_VGPR64q_VGPR64q) = ANDN<R64W, R64, R64>;)