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-rw-r--r--ext/-test-/hash/delete.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/ext/-test-/hash/delete.c b/ext/-test-/hash/delete.c
index 1a7c373b97..10d4aec6e7 100644
--- a/ext/-test-/hash/delete.c
+++ b/ext/-test-/hash/delete.c
@@ -1,5 +1,7 @@
#include "ruby.h"
+extern VALUE rb_hash_delete_entry(VALUE hash, VALUE key);
+
static VALUE
hash_delete(VALUE hash, VALUE key)
{