diff --git a/source/Buoy-Math-GS64-Extensions/Integer.extension.st b/source/Buoy-Math-GS64-Extensions/Integer.extension.st
index bbb385a..21a9fa4 100644
--- a/source/Buoy-Math-GS64-Extensions/Integer.extension.st
+++ b/source/Buoy-Math-GS64-Extensions/Integer.extension.st
@@ -1,5 +1,12 @@
 Extension { #name : #Integer }
 
+{ #category : #'*Buoy-Math-GS64-Extensions' }
+Integer >> hashMultiply [
+	"No need to do something special in GS64"
+
+	^ self
+]
+
 { #category : #'*Buoy-Math-GS64-Extensions' }
 Integer >> isInteger [
 	"True for all subclasses of Integer."