diff --git a/lib/Bytecode/Reader/ConstantReader.cpp b/lib/Bytecode/Reader/ConstantReader.cpp
index eb0cadc..ad27739 100644
--- a/lib/Bytecode/Reader/ConstantReader.cpp
+++ b/lib/Bytecode/Reader/ConstantReader.cpp
@@ -160,7 +160,7 @@
     // abstract type to use the newty.  This also will cause the opaque type
     // to be deleted...
     //
-    cast<DerivedType>(Tab[i].get())->refineAbstractTypeTo(NewTy);
+    ((DerivedType*)Tab[i].get())->refineAbstractTypeTo(NewTy);
 
     // This should have replace the old opaque type with the new type in the
     // value table... or with a preexisting type that was already in the system
diff --git a/lib/Bytecode/Reader/InstructionReader.cpp b/lib/Bytecode/Reader/InstructionReader.cpp
index 9b98d94..0916b2b 100644
--- a/lib/Bytecode/Reader/InstructionReader.cpp
+++ b/lib/Bytecode/Reader/InstructionReader.cpp
@@ -228,9 +228,9 @@
     if (M == 0) return failure(true);
 
     // Check to make sure we have a pointer to method type
-    PointerType *PTy = dyn_cast<PointerType>(M->getType());
+    const PointerType *PTy = dyn_cast<PointerType>(M->getType());
     if (PTy == 0) return failure(true);
-    FunctionType *MTy = dyn_cast<FunctionType>(PTy->getElementType());
+    const FunctionType *MTy = dyn_cast<FunctionType>(PTy->getElementType());
     if (MTy == 0) return failure(true);
 
     vector<Value *> Params;
@@ -288,9 +288,9 @@
     if (M == 0) return failure(true);
 
     // Check to make sure we have a pointer to method type
-    PointerType *PTy = dyn_cast<PointerType>(M->getType());
+    const PointerType *PTy = dyn_cast<PointerType>(M->getType());
     if (PTy == 0) return failure(true);
-    FunctionType *MTy = dyn_cast<FunctionType>(PTy->getElementType());
+    const FunctionType *MTy = dyn_cast<FunctionType>(PTy->getElementType());
     if (MTy == 0) return failure(true);
 
     vector<Value *> Params;