diff --git a/src/crystal/compiler_rt/mul.cr b/src/crystal/compiler_rt/mul.cr
index 1d4604225fde..affe2f2f8678 100644
--- a/src/crystal/compiler_rt/mul.cr
+++ b/src/crystal/compiler_rt/mul.cr
@@ -1,7 +1,7 @@
 # :nodoc:
 private macro __mul_impl(name, type, n)
-  # Ported from https://github.com/llvm/llvm-project/blob/ce59ccd04023cab3a837da14079ca2dcbfebb70c/compiler-rt/lib/builtins/int_mulo_impl.inc
   # :nodoc:
+  # Ported from https://github.com/llvm/llvm-project/blob/ce59ccd04023cab3a837da14079ca2dcbfebb70c/compiler-rt/lib/builtins/int_mulo_impl.inc
   fun {{name}}(a : {{type}}, b : {{type}}, overflow : Int32*) : {{type}}
     overflow.value = 0
     result = a &* b