diff --git a/src/classes/CMakeLists.txt b/src/classes/CMakeLists.txt
index 1c90cfd5d..039a04efa 100644
--- a/src/classes/CMakeLists.txt
+++ b/src/classes/CMakeLists.txt
@@ -248,13 +248,16 @@ install(
 
 #--- install headers ----------------------------------------------------------
 install(
-  FILES ${MUSRFIT_INC}/PFitterFcn.h
+  FILES ${MUSRFIT_INC}/PFindRun.h
+        ${MUSRFIT_INC}/PFitterFcn.h
         ${MUSRFIT_INC}/PFitter.h
         ${MUSRFIT_INC}/PFourierCanvas.h
-        ${MUSRFIT_INC}/PFourier.h 
+        ${MUSRFIT_INC}/PFourier.h
+        ${MUSRFIT_INC}/PFunctionAst.h 
         ${MUSRFIT_INC}/PFunctionGrammar.h
         ${MUSRFIT_INC}/PFunction.h
         ${MUSRFIT_INC}/PFunctionHandler.h
+        ${MUSRFIT_INC}/PMsgBox.h
         ${MUSRFIT_INC}/PMsr2Data.h
         ${MUSRFIT_INC}/PMsrHandler.h
         ${MUSRFIT_INC}/PMusrCanvas.h