--- a/src/include/function/Makefile.am
+++ b/src/include/function/Makefile.am
@@ -2,6 +2,7 @@
 
 funcinclude_HEADERS = FuncTab.h Function.h ScalarFunction.h	\
 VectorFunction.h ArrayFunction.h LinkFunction.h FunctionPtr.h	\
-FuncError.h DPQFunction.h DFunction.h PFunction.h QFunction.h
+FuncError.h DPQFunction.h DFunction.h PFunction.h QFunction.h   \
+ScalarLogDensity.h VectorLogDensity.h ArrayLogDensity.h
 
 noinst_HEADERS = testfun.h