diff --git a/PVRTCEncoder/CMakeLists.txt b/PVRTCEncoder/CMakeLists.txt
index 8c08479..e04d6d3 100644
--- a/PVRTCEncoder/CMakeLists.txt
+++ b/PVRTCEncoder/CMakeLists.txt
@@ -57,6 +57,7 @@ SET( HEADERS
   ${LIBRARY_HEADERS}
   src/Block.h
   src/PVRTCImage.h
+  src/Indexer.h
 )
 
 SET( SOURCES