diff --git a/llvmpy/src/DataLayout.py b/llvmpy/src/DataLayout.py
index 7085f52..812a83d 100644
--- a/llvmpy/src/DataLayout.py
+++ b/llvmpy/src/DataLayout.py
@@ -30,7 +30,7 @@ class DataLayout:
     isLittleEndian = Method(cast(Bool, bool))
     isBigEndian = Method(cast(Bool, bool))
 
-    getStringRepresentation = Method(cast(StringRef, str))
+    getStringRepresentation = Method(cast(StdString, str))
 
     @CustomPythonMethod
     def __str__(self):
diff --git a/llvmpy/src/Pass.py b/llvmpy/src/Pass.py
index ad03d9a..52173cd 100644
--- a/llvmpy/src/Pass.py
+++ b/llvmpy/src/Pass.py
@@ -15,7 +15,7 @@ class Pass:
     _include_ = 'llvm/Pass.h'
 
     delete = Destructor()
-    getPassName = Method(cast(StringRef, str))
+    getPassName = Method(cast(StdString, str))
     dump = Method()
 
 @ModulePass
diff --git a/llvmpy/src/Support/TargetRegistry.py b/llvmpy/src/Support/TargetRegistry.py
index 640364b..2a445e7 100644
--- a/llvmpy/src/Support/TargetRegistry.py
+++ b/llvmpy/src/Support/TargetRegistry.py
@@ -16,8 +16,8 @@ from src.Support.CodeGen import Reloc, CodeModel, CodeGenOpt
 class Target:
     getNext = Method(const(ptr(Target)))
 
-    getName = Method(cast(StringRef, str))
-    getShortDescription = Method(cast(StringRef, str))
+    getName = Method(cast(StdString, str))
+    getShortDescription = Method(cast(StdString, str))
 
     def _has():
         return Method(cast(Bool, bool))