diff --git a/src/Makefile.am b/src/Makefile.am
index 958d5429..774aa5ae 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -299,6 +299,7 @@ libX11_la_SOURCES = \
                   UnldFont.c \
                   UnmapSubs.c \
                   UnmapWin.c \
+                  utlist.h \
                   VisUtil.c \
                   WarpPtr.c \
                   Window.c \