diff --git a/include/osg/GLExtensions b/include/osg/GLExtensions
index ea8e9945c..65e8eb697 100644
--- a/include/osg/GLExtensions
+++ b/include/osg/GLExtensions
@@ -580,6 +580,12 @@ class OSG_EXPORT GLExtensions : public osg::Referenced
         void (GL_APIENTRY * glWaitSync) (GLsync sync, GLbitfield flags, GLuint64 timeout);
         void (GL_APIENTRY * glGetSynciv) (GLsync sync, GLenum pname, GLsizei bufSize, GLsizei *length, GLint *values);
 
+        // Indirect Rendering
+        void (GL_APIENTRY * glDrawArraysIndirect) (GLenum  mode,  const void * indirect);
+        void (GL_APIENTRY * glMultiDrawArraysIndirect) (GLenum mode, const void *indirect, GLsizei drawcount, GLsizei stride);
+        void (GL_APIENTRY * glDrawElementsIndirect) (GLenum mode,  GLenum type,  const void *indirect);
+        void (GL_APIENTRY * glMultiDrawElementsIndirect)(     GLenum mode,      GLenum type,      const void *indirect,      GLsizei drawcount,      GLsizei stride);
+
 
         // Transform feedback
         void (GL_APIENTRY * glBeginTransformFeedback) (GLenum primitiveMode);
diff --git a/src/osg/GLExtensions.cpp b/src/osg/GLExtensions.cpp
index 92c5eb25c..1114d6d13 100644
--- a/src/osg/GLExtensions.cpp
+++ b/src/osg/GLExtensions.cpp
@@ -1049,6 +1049,11 @@ GLExtensions::GLExtensions(unsigned int contextID)
     osg::setGLExtensionFuncPtr(glWaitSync, "glWaitSync");
     osg::setGLExtensionFuncPtr(glGetSynciv, "glGetSynciv");
 
+    // Indirect Rendering
+    osg::setGLExtensionFuncPtr(glDrawArraysIndirect, "glDrawArraysIndirect", "glDrawArraysIndirectEXT");
+    osg::setGLExtensionFuncPtr(glMultiDrawArraysIndirect, "glMultiDrawArraysIndirect", "glMultiDrawArraysIndirectEXT");
+    osg::setGLExtensionFuncPtr(glDrawElementsIndirect, "glDrawElementsIndirect", "glDrawElementsIndirectEXT");
+    osg::setGLExtensionFuncPtr(glMultiDrawElementsIndirect, "glMultiDrawElementsIndirect", "glMultiDrawElementsIndirectEXT");
 
     // Transform Feeedback
     osg::setGLExtensionFuncPtr(glBeginTransformFeedback, "glBeginTransformFeedback", "glBeginTransformFeedbackEXT");