diff --git a/src/clib/Makefile.am b/src/clib/Makefile.am
index b3d9050f882..3a1252d6d54 100644
--- a/src/clib/Makefile.am
+++ b/src/clib/Makefile.am
@@ -10,7 +10,7 @@ lib_LTLIBRARIES = libpioc.la
 libpioc_la_LDFLAGS = -version-info 2:0:1
 
 # The library header file will be installed in include dir.
-include_HEADERS = pio.h
+include_HEADERS = pio.h uthash.h
 
 # The library soure files.
 libpioc_la_SOURCES = bget.c pioc_sc.c pio_darray.c pio_file.c		\