diff --git a/Documentation/technical/api-sha1-array.txt b/Documentation/technical/api-sha1-array.txt
index 4a4bae8109..45d1c517cd 100644
--- a/Documentation/technical/api-sha1-array.txt
+++ b/Documentation/technical/api-sha1-array.txt
@@ -25,9 +25,6 @@ Functions
 	the array (but note that some operations below may lose this
 	ordering).
 
-`sha1_array_sort`::
-	Sort the elements in the array.
-
 `sha1_array_lookup`::
 	Perform a binary search of the array for a specific sha1.
 	If found, returns the offset (in number of elements) of the
diff --git a/sha1-array.c b/sha1-array.c
index b2f47f98fb..6f4a2246c9 100644
--- a/sha1-array.c
+++ b/sha1-array.c
@@ -14,7 +14,7 @@ static int void_hashcmp(const void *a, const void *b)
 	return hashcmp(a, b);
 }
 
-void sha1_array_sort(struct sha1_array *array)
+static void sha1_array_sort(struct sha1_array *array)
 {
 	qsort(array->sha1, array->nr, sizeof(*array->sha1), void_hashcmp);
 	array->sorted = 1;
diff --git a/sha1-array.h b/sha1-array.h
index 4499b5dad4..72bb33bec6 100644
--- a/sha1-array.h
+++ b/sha1-array.h
@@ -11,7 +11,6 @@ struct sha1_array {
 #define SHA1_ARRAY_INIT { NULL, 0, 0, 0 }
 
 void sha1_array_append(struct sha1_array *array, const unsigned char *sha1);
-void sha1_array_sort(struct sha1_array *array);
 int sha1_array_lookup(struct sha1_array *array, const unsigned char *sha1);
 void sha1_array_clear(struct sha1_array *array);