diff --git a/test/Assembler/invalid-hexint.ll b/test/Assembler/invalid-hexint.ll
new file mode 100644
index 00000000000..a11b8cd0e88
--- /dev/null
+++ b/test/Assembler/invalid-hexint.ll
@@ -0,0 +1,4 @@
+; RUN: not llvm-as < %s 2>&1 | FileCheck %s
+
+global i64 u0x0p001
+; CHECK: expected value token