diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index fe16442..d848b13 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -488,7 +488,7 @@
 	test $UNAME = "Darwin" && HOST="_APPLE"
 	test $UNAME = "FreeBSD" && HOST="_FreeBSD"
 	test $UNAME = "Cygwin" && HOST="_CYGWIN"
-	HOST="$HOST" OPT_CFLAGS="-O -D_FORTIFY_SOURCE=2" CFLAGS="$CFLAGS" $MAKE CC="$CC" iasl || touch $RDIR/.failed
+	HOST="$HOST" OPT_CFLAGS="-O -D_FORTIFY_SOURCE=2 -D COREBOOT_TOOLCHAIN_VERSION='\"coreboot toolchain v$CROSSGCC_VERSION $CROSSGCC_DATE\"' " CFLAGS="$CFLAGS" $MAKE CC="$CC" iasl || touch $RDIR/.failed
 	rm -f $DESTDIR$TARGETDIR/bin/iasl || touch $RDIR/.failed
 	cp bin/iasl $DESTDIR$TARGETDIR/bin || touch $RDIR/.failed
 }
diff --git a/util/crossgcc/patches/acpica-unix-20150619_iasl.patch b/util/crossgcc/patches/acpica-unix-20150619_iasl.patch
new file mode 100644
index 0000000..6cb087c
--- /dev/null
+++ b/util/crossgcc/patches/acpica-unix-20150619_iasl.patch
@@ -0,0 +1,12 @@
+diff -urN acpica-unix-20150619/source/compiler/asloptions.c acpica-unix-20150619/source/compiler/asloptions.c
+--- acpica-unix-20150619/source/compiler/asloptions.c   2015-06-19 08:56:19.000000000 -0600
++++ acpica-unix-20150619/source/compiler/asloptions.c 2015-12-08 10:44:58.816669240 -0700
+@@ -717,6 +717,7 @@
+         case '^':
+
+             printf (ACPI_COMMON_SIGNON (ASL_COMPILER_NAME));
++            printf ("%s\n", COREBOOT_TOOLCHAIN_VERSION);
+             exit (0);
+
+         case 'a':
+