diff --git a/RenderSystems/GL3Plus/src/GLSL/src/OgreGLSLSeparableProgram.cpp b/RenderSystems/GL3Plus/src/GLSL/src/OgreGLSLSeparableProgram.cpp
index 23783563a87..1d712c2f6fe 100644
--- a/RenderSystems/GL3Plus/src/GLSL/src/OgreGLSLSeparableProgram.cpp
+++ b/RenderSystems/GL3Plus/src/GLSL/src/OgreGLSLSeparableProgram.cpp
@@ -68,6 +68,7 @@ namespace Ogre
         }
 
             #define GL_MESH_SHADER_BIT_NV 0x00000040
+            #define GL_TASK_SHADER_BIT_NV 0x00000080
             GLenum ogre2gltype[GPT_COUNT] = {
                 GL_VERTEX_SHADER_BIT,
                 GL_FRAGMENT_SHADER_BIT,
@@ -75,7 +76,8 @@ namespace Ogre
                 GL_TESS_EVALUATION_SHADER_BIT,
                 GL_TESS_CONTROL_SHADER_BIT,
                 GL_MESH_SHADER_BIT_NV,
-                GL_COMPUTE_SHADER_BIT
+                GL_COMPUTE_SHADER_BIT,
+                GL_TASK_SHADER_BIT_NV
             };
 
             for (auto s : mShaders)