diff --git a/lib/std/compress/lzma.zig b/lib/std/compress/lzma.zig
index ff05bc1c8b..aa35c3ffa9 100644
--- a/lib/std/compress/lzma.zig
+++ b/lib/std/compress/lzma.zig
@@ -77,7 +77,7 @@ pub fn Decompress(comptime ReaderType: type) type {
             const input = self.to_read.items;
             const n = @min(input.len, output.len);
             @memcpy(output[0..n], input[0..n]);
-            @memcpy(input[0 .. input.len - n], input[n..]);
+            std.mem.copyForwards(u8, input[0 .. input.len - n], input[n..]);
             self.to_read.shrinkRetainingCapacity(input.len - n);
             return n;
         }