diff --git a/packages/ProbLog/Makefile.in b/packages/ProbLog/Makefile.in
index b5dadb4fb..3f98e9189 100644
--- a/packages/ProbLog/Makefile.in
+++ b/packages/ProbLog/Makefile.in
@@ -51,6 +51,7 @@ PROBLOG_PROGRAMS= \
 	$(srcdir)/problog/print_learning.yap \
 	$(srcdir)/problog/utils_learning.yap \
 	$(srcdir)/problog/version_control.yap \
+	$(srcdir)/problog/nestedtries.yap \
 	$(srcdir)/problog/variables.yap
 
 PROBLOG_EXAMPLES = \