diff --git a/Makefile.in b/Makefile.in
index 37b793b168..e45622d520 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -109,6 +109,7 @@ ALL_BASE_HEADERS =  \
 	wx/debug.h \
 	wx/defs.h \
 	wx/dir.h \
+	wx/dlimpexp.h \
 	wx/dynarray.h \
 	wx/dynlib.h \
 	wx/dynload.h \