diff --git a/src/osg/Texture.cpp b/src/osg/Texture.cpp
index 693b2d394..46819fe9b 100644
--- a/src/osg/Texture.cpp
+++ b/src/osg/Texture.cpp
@@ -1494,7 +1494,7 @@ void Texture::computeInternalFormatWithImage(const osg::Image& image) const
         case(GL_LUMINANCE) : internalFormat = GL_RED; break; // should it be swizzled to match RGBA(LUMINANCE, LUMINANCE, LUMINANCE, 1.0)?
         case(1) : internalFormat = GL_RED; break; // or sould this be GL_ALPHA?
         case(2) : internalFormat = GL_RG; break; // should we assume GL_LUMINANCE_ALPHA?
-        case(GL_LUMINANCE_ALPHA) : internalFormat = GL_RB; break; // should it be swizlled to match RGAB(LUMUNIANCE, LUMINANCE, LUMINANCE, ALPHA)?
+        case(GL_LUMINANCE_ALPHA) : internalFormat = GL_RG; break; // should it be swizlled to match RGAB(LUMUNIANCE, LUMINANCE, LUMINANCE, ALPHA)?
         case(3) : internalFormat = GL_RGB; break;
         case(4) : internalFormat = GL_RGBA; break;
         default: break;