diff --git a/simgear/scene/viewer/CompositorBuffer.cxx b/simgear/scene/viewer/CompositorBuffer.cxx
index 476324c9..85b4fa0b 100644
--- a/simgear/scene/viewer/CompositorBuffer.cxx
+++ b/simgear/scene/viewer/CompositorBuffer.cxx
@@ -54,9 +54,6 @@ PropStringMap<BufferFormat> buffer_format_map {
     {"r32f", {GL_R32F, GL_RED, GL_FLOAT}},
     {"rg16f", {GL_RG16F, GL_RG, GL_HALF_FLOAT}},
     {"rg32f", {GL_RG32F, GL_RG, GL_FLOAT}},
-#if defined(OSG_GL3_FEATURES)
-    {"r11g11b10f", {GL_R11F_G11F_B10F, GL_RGB, GL_FLOAT}},
-#endif
     {"depth16", {GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT}},
     {"depth24", {GL_DEPTH_COMPONENT24, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT}},
     {"depth32f", {GL_DEPTH_COMPONENT32F, GL_DEPTH_COMPONENT, GL_FLOAT}},