diff --git a/build-aarch64-user_vfp.patch b/build-aarch64-user_vfp.patch
new file mode 100644
index 0000000..85e72c7
--- /dev/null
+++ b/build-aarch64-user_vfp.patch
@@ -0,0 +1,12 @@
+diff -up thunderbird-68.0/js/src/wasm/WasmSignalHandlers.cpp.aarch64-user_vfp thunderbird-68.0/js/src/wasm/WasmSignalHandlers.cpp
+--- thunderbird-68.0/js/src/wasm/WasmSignalHandlers.cpp.aarch64-user_vfp	2019-09-05 08:57:46.443137916 +0200
++++ thunderbird-68.0/js/src/wasm/WasmSignalHandlers.cpp	2019-09-05 08:58:07.776196823 +0200
+@@ -244,7 +244,7 @@ using mozilla::DebugOnly;
+ // emulation here.
+ 
+ #if defined(__linux__) && defined(__arm__)
+-#  define WASM_EMULATE_ARM_UNALIGNED_FP_ACCESS
++//#  define WASM_EMULATE_ARM_UNALIGNED_FP_ACCESS
+ #endif
+ 
+ #ifdef WASM_EMULATE_ARM_UNALIGNED_FP_ACCESS
diff --git a/thunderbird.spec b/thunderbird.spec
index 0045c64..773830a 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -118,6 +118,7 @@ Patch26:        build-icu-big-endian.patch
 Patch226:       rhbz-1354671.patch
 Patch415:       Bug-1238661---fix-mozillaSignalTrampoline-to-work-.patch
 Patch416:       firefox-SIOCGSTAMP.patch
+Patch417:       build-aarch64-user_vfp.patch
 Patch103:       rhbz-1219542-s390-build.patch
 Patch105:       thunderbird-debug.patch
 
@@ -264,6 +265,7 @@ debug %{name}, you want to install %{name}-debuginfo instead.
 %patch415 -p1 -b .mozilla-1238661
 %endif
 %patch416 -p1 -b .SIOCGSTAMP
+%patch417 -p1 -b .aarch64-user_vfp
 
 %patch306 -p1 -b .1353817
 %if 0%{?disable_elfhack}