diff --git a/include/aws/sdkutils/endpoints_rule_engine.h b/include/aws/sdkutils/endpoints_rule_engine.h
index 65710ab..ac9416d 100644
--- a/include/aws/sdkutils/endpoints_rule_engine.h
+++ b/include/aws/sdkutils/endpoints_rule_engine.h
@@ -244,7 +244,7 @@ AWS_SDKUTILS_API int aws_endpoints_request_context_add_string_array(
     struct aws_allocator *allocator,
     struct aws_endpoints_request_context *context,
     struct aws_byte_cursor name,
-    struct aws_byte_cursor *value_array,
+    const struct aws_byte_cursor *value_array,
     size_t len);
 
 /*
diff --git a/source/endpoints_rule_engine.c b/source/endpoints_rule_engine.c
index 05b4b42..3096fd3 100644
--- a/source/endpoints_rule_engine.c
+++ b/source/endpoints_rule_engine.c
@@ -746,7 +746,7 @@ int aws_endpoints_request_context_add_string_array(
     struct aws_allocator *allocator,
     struct aws_endpoints_request_context *context,
     struct aws_byte_cursor name,
-    struct aws_byte_cursor *values,
+    const struct aws_byte_cursor *values,
     size_t len) {
 
     struct aws_endpoints_scope_value *val = aws_endpoints_scope_value_new(allocator, name);