diff --git a/CMakeLists.txt b/CMakeLists.txt
index f8ef18d6..0d1cfa67 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -541,14 +541,12 @@ install(FILES
 
     #from lstm/makefile.am
     src/lstm/convolve.h
-    src/lstm/ctc.h
     src/lstm/fullyconnected.h
     src/lstm/functions.h
     src/lstm/input.h
     src/lstm/lstm.h
     src/lstm/lstmrecognizer.h
     src/lstm/maxpool.h
-    src/lstm/networkbuilder.h
     src/lstm/network.h
     src/lstm/networkio.h
     src/lstm/networkscratch.h