diff --git a/exercises/100_for4.zig b/exercises/100_for4.zig
index e0fa602..c8a1161 100644
--- a/exercises/100_for4.zig
+++ b/exercises/100_for4.zig
@@ -41,12 +41,12 @@ pub fn main() void {
 
     for (hex_nums, ???) |hn, ???| {
         if (hn != dn) {
-            std.debug.print("Uh oh! Found a mismatch: {d} vs {d}\n", .{ hn, dn });
+            print("Uh oh! Found a mismatch: {d} vs {d}\n", .{ hn, dn });
             return;
         }
     }
 
-    std.debug.print("Arrays match!\n", .{});
+    print("Arrays match!\n", .{});
 }
 //
 // You are perhaps wondering what happens if one of the two lists
diff --git a/patches/patches/100_for4.patch b/patches/patches/100_for4.patch
index 3539be2..ad73e9a 100644
--- a/patches/patches/100_for4.patch
+++ b/patches/patches/100_for4.patch
@@ -7,5 +7,5 @@
 -    for (hex_nums, ???) |hn, ???| {
 +    for (hex_nums, dec_nums) |hn, dn| {
          if (hn != dn) {
-             std.debug.print("Uh oh! Found a mismatch: {d} vs {d}\n", .{ hn, dn });
+             print("Uh oh! Found a mismatch: {d} vs {d}\n", .{ hn, dn });
              return;