diff --git a/src/osg/GL2Extensions.cpp b/src/osg/GL2Extensions.cpp
index 8d9ac3afc..9ec4b7e1d 100644
--- a/src/osg/GL2Extensions.cpp
+++ b/src/osg/GL2Extensions.cpp
@@ -2158,7 +2158,7 @@ bool GL2Extensions::getProgramInfoLog( GLuint program, std::string& result ) con
     {
         GLchar* infoLog = new GLchar[bufLen];
         glGetProgramInfoLog( program, bufLen, &strLen, infoLog );
-        if( strLen > 0 ) result = infoLog;
+        if( strLen > 0 ) result = reinterpret_cast<char*>(infoLog);
         delete [] infoLog;
     }
     return (strLen > 0);
@@ -2175,7 +2175,7 @@ bool GL2Extensions::getShaderInfoLog( GLuint shader, std::string& result ) const
     {
         GLchar* infoLog = new GLchar[bufLen];
         glGetShaderInfoLog( shader, bufLen, &strLen, infoLog );
-        if( strLen > 0 ) result = infoLog;
+        if( strLen > 0 ) result = reinterpret_cast<char*>(infoLog);
         delete [] infoLog;
     }
     return (strLen > 0);
@@ -2194,7 +2194,7 @@ bool GL2Extensions::getAttribLocation( const char* attribName, GLuint& location
     if( linked == GL_FALSE ) return false;
 
     // is there such a named attribute?
-    GLint loc = glGetAttribLocation( program, attribName );
+    GLint loc = glGetAttribLocation( program, reinterpret_cast<const GLchar*>(attribName) );
     if( loc < 0 ) return false;
 
     location = loc;
@@ -2217,7 +2217,7 @@ bool GL2Extensions::getFragDataLocation( const char* fragDataName, GLuint& locat
     if (_glGetFragDataLocation == NULL) return false;
 
     // is there such a named attribute?
-    GLint loc = glGetFragDataLocation( program, fragDataName );
+    GLint loc = glGetFragDataLocation( program, reinterpret_cast<const GLchar*>(fragDataName) );
     if( loc < 0 ) return false;
 
     location = loc;
diff --git a/src/osg/Program.cpp b/src/osg/Program.cpp
index 8b7ca7da3..f08ce9c64 100644
--- a/src/osg/Program.cpp
+++ b/src/osg/Program.cpp
@@ -490,7 +490,7 @@ void Program::PerContextProgram::linkProgram(osg::State& state)
         itr != programBindlist.end(); ++itr )
     {
         osg::notify(osg::NOTICE)<<"Program's vertex attrib binding "<<itr->second<<", "<<itr->first<<std::endl;
-        _extensions->glBindAttribLocation( _glProgramHandle, itr->second, itr->first.c_str() );
+        _extensions->glBindAttribLocation( _glProgramHandle, itr->second, reinterpret_cast<const GLchar*>(itr->first.c_str()) );
     }
 
     // set any explicit vertex attribute bindings that are set up via osg::State, such as the vertex arrays
@@ -502,7 +502,7 @@ void Program::PerContextProgram::linkProgram(osg::State& state)
             itr != stateBindlist.end(); ++itr )
         {
             osg::notify(osg::NOTICE)<<"State's vertex attrib binding "<<itr->second<<", "<<itr->first<<std::endl;
-            _extensions->glBindAttribLocation( _glProgramHandle, itr->second, itr->first.c_str() );
+            _extensions->glBindAttribLocation( _glProgramHandle, itr->second, reinterpret_cast<const GLchar*>(itr->first.c_str()) );
         }
     }
 
@@ -511,7 +511,7 @@ void Program::PerContextProgram::linkProgram(osg::State& state)
     for( FragDataBindingList::const_iterator itr = fdbindlist.begin();
         itr != fdbindlist.end(); ++itr )
     {
-        _extensions->glBindFragDataLocation( _glProgramHandle, itr->second, itr->first.c_str() );
+        _extensions->glBindFragDataLocation( _glProgramHandle, itr->second, reinterpret_cast<const GLchar*>(itr->first.c_str()) );
     }
 
     // link the glProgram
@@ -562,7 +562,7 @@ void Program::PerContextProgram::linkProgram(osg::State& state)
             
             if( loc != -1 )
             {
-                _uniformInfoMap[name] = ActiveVarInfo(loc,type,size);
+                _uniformInfoMap[reinterpret_cast<char*>(name)] = ActiveVarInfo(loc,type,size);
 
                 osg::notify(osg::INFO)
                     << "\tUniform \"" << name << "\""
@@ -594,7 +594,7 @@ void Program::PerContextProgram::linkProgram(osg::State& state)
             
             if( loc != -1 )
             {
-                _attribInfoMap[name] = ActiveVarInfo(loc,type,size);
+                _attribInfoMap[reinterpret_cast<char*>(name)] = ActiveVarInfo(loc,type,size);
 
                 osg::notify(osg::INFO)
                     << "\tAttrib \"" << name << "\""
diff --git a/src/osg/Shader.cpp b/src/osg/Shader.cpp
index b4b4b1f64..9b4171bcf 100644
--- a/src/osg/Shader.cpp
+++ b/src/osg/Shader.cpp
@@ -500,7 +500,7 @@ void Shader::PerContextShader::compileShader(osg::State& state)
     }
 
     GLint compiled = GL_FALSE;
-    const char* sourceText = source.c_str();
+    const GLchar* sourceText = reinterpret_cast<const GLchar*>(source.c_str());
     _extensions->glShaderSource( _glShaderHandle, 1, &sourceText, NULL );
     _extensions->glCompileShader( _glShaderHandle );
     _extensions->glGetShaderiv( _glShaderHandle, GL_COMPILE_STATUS, &compiled );