diff --git a/src/IECoreGL/Selector.cpp b/src/IECoreGL/Selector.cpp
index 38555febf1..53dd5d063a 100644
--- a/src/IECoreGL/Selector.cpp
+++ b/src/IECoreGL/Selector.cpp
@@ -443,10 +443,10 @@ class Selector::Implementation : public IECore::RefCounted
 
 			std::vector<GLenum> buffers;
 			buffers.resize( std::max( fragDataLocation, depthDataLocation ) + 1, GL_NONE );
-			buffers[buffers.size() - ( depthDataLocation > 0 ? 2 : 1 )] = GL_COLOR_ATTACHMENT0;
+			buffers[fragDataLocation] = GL_COLOR_ATTACHMENT0;
 			if( m_useCameraDepth )
 			{
-				buffers[buffers.size() - 1] = GL_COLOR_ATTACHMENT1;
+				buffers[depthDataLocation] = GL_COLOR_ATTACHMENT1;
 			}
 			glDrawBuffers( buffers.size(), &buffers[0] );