diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index 0951fb60e4..327027a565 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -54,7 +54,7 @@ GCC_VERSION=8.3.0
 GCC_AUTOCONF_VERSION=2.69
 BINUTILS_VERSION=2.32
 GDB_VERSION=8.2.1
-IASL_VERSION=20190215
+IASL_VERSION=20190509
 PYTHON_VERSION=3.7.2
 EXPAT_VERSION=2.2.6
 # CLANG version number
diff --git a/util/crossgcc/patches/acpica-unix2-20190215_iasl.patch b/util/crossgcc/patches/acpica-unix2-20190509_iasl.patch
similarity index 73%
rename from util/crossgcc/patches/acpica-unix2-20190215_iasl.patch
rename to util/crossgcc/patches/acpica-unix2-20190509_iasl.patch
index c4f605292b..49df22510f 100644
--- a/util/crossgcc/patches/acpica-unix2-20190215_iasl.patch
+++ b/util/crossgcc/patches/acpica-unix2-20190509_iasl.patch
@@ -1,6 +1,6 @@
-diff -Naur acpica-unix2-20190215_/source/compiler/asloptions.c acpica-unix2-20190215/source/compiler/asloptions.c > acpica-unix2-20190215_iasl.patch
---- acpica-unix2-20190108_/source/compiler/asloptions.c
-+++ acpica-unix2-20190108/source/compiler/asloptions.c
+diff -Naur acpica-unix2-20190509_/source/compiler/asloptions.c acpica-unix2-20190509/source/compiler/asloptions.c > acpica-unix2-20190509_iasl.patch
+--- acpica-unix2-20190509_/source/compiler/asloptions.c
++++ acpica-unix2-20190509/source/compiler/asloptions.c
 @@ -126,6 +126,7 @@
      if (Gbl_DoSignon)
      {
diff --git a/util/crossgcc/sum/acpica-unix2-20190215.tar.gz.cksum b/util/crossgcc/sum/acpica-unix2-20190215.tar.gz.cksum
deleted file mode 100644
index 310454d603..0000000000
--- a/util/crossgcc/sum/acpica-unix2-20190215.tar.gz.cksum
+++ /dev/null
@@ -1 +0,0 @@
-82d729cb09edc50ee11669651683ca5a5c0f4d5a  tarballs/acpica-unix2-20190215.tar.gz
diff --git a/util/crossgcc/sum/acpica-unix2-20190509.tar.gz.cksum b/util/crossgcc/sum/acpica-unix2-20190509.tar.gz.cksum
new file mode 100644
index 0000000000..2f53d714fb
--- /dev/null
+++ b/util/crossgcc/sum/acpica-unix2-20190509.tar.gz.cksum
@@ -0,0 +1 @@
+aa4d4f8051800e84a5ed5b71635594aaca749e8d  tarballs/acpica-unix2-20190509.tar.gz