diff --git a/lib/std/zig/LibCInstallation.zig b/lib/std/zig/LibCInstallation.zig
index 770743acf42b3aff4aa4e5232724fe239b4e0007..6fa49a0ce985c9115495a16c862e7d6e1a9062d5 100644
--- a/lib/std/zig/LibCInstallation.zig
+++ b/lib/std/zig/LibCInstallation.zig
@@ -46,7 +46,7 @@ pub fn parse(allocator: Allocator, io: Io, libc_file: []const u8, target: *const
     const field_names = comptime std.meta.fieldNames(LibCInstallation);
     const FoundKey = struct {
         found: bool,
-        allocated: ?[:0]u8,
+        allocated: ?[]u8,
     };
 
     var found_keys: [field_names.len]FoundKey = @splat(.{ .found = false, .allocated = null });
@@ -72,7 +72,7 @@ pub fn parse(allocator: Allocator, io: Io, libc_file: []const u8, target: *const
                 if (value.len == 0) {
                     @field(self, field_name) = null;
                 } else {
-                    found_keys[i].allocated = try allocator.dupeSentinel(u8, value, 0);
+                    found_keys[i].allocated = try allocator.dupe(u8, value);
                     @field(self, field_name) = found_keys[i].allocated;
                 }
                 break;