1 files changed, 1 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 72f16882e6..12e3c2d865 100644
--- a/Makefile
+++ b/Makefile
@@ -874,6 +874,7 @@ LIB_OBJS += linear-assignment.o
 LIB_OBJS += help.o
 LIB_OBJS += hex.o
 LIB_OBJS += ident.o
+LIB_OBJS += interdiff.o
 LIB_OBJS += kwset.o
 LIB_OBJS += levenshtein.o
 LIB_OBJS += line-log.o