diff --git a/contrib/src/gizmos/Makefile.in b/contrib/src/gizmos/Makefile.in
index 72048fd583..979d88de28 100644
--- a/contrib/src/gizmos/Makefile.in
+++ b/contrib/src/gizmos/Makefile.in
@@ -13,9 +13,9 @@ LIBVERSION_AGE=0
 HEADER_PATH=$(top_srcdir)/contrib/include/wx
 HEADER_SUBDIR=gizmos
 
-HEADERS=multicell.h gizmos.h
+HEADERS=multicell.h splittree.h
 
-OBJECTS=multicell.o gizmos.o
+OBJECTS=multicell.o splittree.o
 
 APPEXTRADEFS=-I$(top_srcdir)/contrib/include