diff --git a/tests/ddb/Makefile.am b/tests/ddb/Makefile.am
index 035178314..5e7fa0f20 100644
--- a/tests/ddb/Makefile.am
+++ b/tests/ddb/Makefile.am
@@ -1,9 +1,9 @@
-#if HAVE_FLEX_BISON
+if HAVE_FLEX_BISON
 flexbison_PROGRAMS_ = test-ddb
 flexbison_check_SCRIPTS_ = check-ddb.sh
 flexbison_BUILT_SOURCES_ = ddb-txt.tab.c ddb-txt.tab.h ddb-txt.yy.c
 flexbison_CLEANFILES_ = ddb-txt.output
-#endif
+endif
 
 check_PROGRAMS = $(flexbison_PROGRAMS_)