diff --git a/acinclude.m4 b/acinclude.m4
index 439ad89126..3edbf24d51 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -283,6 +283,9 @@ else
 		powerpc-apple-darwin6.0*)
 			AFS_SYSNAME="ppc_darwin_60"
 			;;
+		powerpc-apple-darwin6.1*)
+			AFS_SYSNAME="ppc_darwin_60"
+			;;
 		sparc-sun-solaris2.5*)
 			AFS_SYSNAME="sun4x_55"
 			;;