diff --git a/lib/Target/X86/MachineCodeEmitter.cpp b/lib/Target/X86/MachineCodeEmitter.cpp
index 38d1be6..dc9f4c0 100644
--- a/lib/Target/X86/MachineCodeEmitter.cpp
+++ b/lib/Target/X86/MachineCodeEmitter.cpp
@@ -213,6 +213,7 @@
   case X86II::Arg80:  return 10;
   case X86II::Arg128: return 16;
   default: assert(0 && "Memory size not set!");
+    return 0;
   }
 }
 
diff --git a/lib/Target/X86/X86CodeEmitter.cpp b/lib/Target/X86/X86CodeEmitter.cpp
index 38d1be6..dc9f4c0 100644
--- a/lib/Target/X86/X86CodeEmitter.cpp
+++ b/lib/Target/X86/X86CodeEmitter.cpp
@@ -213,6 +213,7 @@
   case X86II::Arg80:  return 10;
   case X86II::Arg128: return 16;
   default: assert(0 && "Memory size not set!");
+    return 0;
   }
 }