diff --git a/lib/std/ascii.zig b/lib/std/ascii.zig
index 5a9248f2f57d4f60c86184558b8084b50c1e0b5d..e346e87eb6805c0328d909a1709223c628db5858 100644
--- a/lib/std/ascii.zig
+++ b/lib/std/ascii.zig
@@ -378,17 +378,11 @@ test endsWithIgnoreCase {
     try std.testing.expect(!endsWithIgnoreCase("BoB", "Bo"));
 }
 
-/// Deprecated in favor of `findIgnoreCase`.
-pub const indexOfIgnoreCase = findIgnoreCase;
-
 /// Finds `needle` in `haystack`, ignoring case, starting at index 0.
 pub fn findIgnoreCase(haystack: []const u8, needle: []const u8) ?usize {
     return findIgnoreCasePos(haystack, 0, needle);
 }
 
-/// Deprecated in favor of `findIgnoreCasePos`.
-pub const indexOfIgnoreCasePos = findIgnoreCasePos;
-
 /// Finds `needle` in `haystack`, ignoring case, starting at `start_index`.
 /// Uses Boyer-Moore-Horspool algorithm on large inputs; `findIgnoreCasePosLinear` on small inputs.
 pub fn findIgnoreCasePos(haystack: []const u8, start_index: usize, needle: []const u8) ?usize {
@@ -410,9 +404,6 @@ pub fn findIgnoreCasePos(haystack: []const u8, start_index: usize, needle: []con
     return null;
 }
 
-/// Deprecated in favor of `findIgnoreCaseLinear`.
-pub const indexOfIgnoreCasePosLinear = findIgnoreCasePosLinear;
-
 /// Consider using `findIgnoreCasePos` instead of this, which will automatically use a
 /// more sophisticated algorithm on larger inputs.
 pub fn findIgnoreCasePosLinear(haystack: []const u8, start_index: usize, needle: []const u8) ?usize {
diff --git a/src/Package/Fetch.zig b/src/Package/Fetch.zig
index d657a133ac167b997b8dd1efdb6c1474a9520271..ee4670070cd9989401703fe82083f2866ef23a71 100644
--- a/src/Package/Fetch.zig
+++ b/src/Package/Fetch.zig
@@ -1151,10 +1151,10 @@ const FileType = enum {
 
     /// Parameter is a content-disposition header value.
     fn fromContentDisposition(cd_header: []const u8) ?FileType {
-        const attach_end = ascii.indexOfIgnoreCase(cd_header, "attachment;") orelse
+        const attach_end = ascii.findIgnoreCase(cd_header, "attachment;") orelse
             return null;
 
-        var value_start = ascii.indexOfIgnoreCasePos(cd_header, attach_end + 1, "filename") orelse
+        var value_start = ascii.findIgnoreCasePos(cd_header, attach_end + 1, "filename") orelse
             return null;
         value_start += "filename".len;
         if (cd_header[value_start] == '*') {