diff --git a/test/Transforms/SimplifyLibCalls/2005-04-24-strcat.ll b/test/Transforms/SimplifyLibCalls/2005-04-24-strcat.ll
new file mode 100644
index 00000000000..d6040603f09
--- /dev/null
+++ b/test/Transforms/SimplifyLibCalls/2005-04-24-strcat.ll
@@ -0,0 +1,16 @@
+; Test that the StrCatOptimizer works correctly
+; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | grep strlen
+; XFAIL: *
+
+declare sbyte* %strcat(sbyte*,sbyte*)
+%hello = constant [6 x sbyte] c"hello\00"
+
+implementation   ; Functions:
+
+int %main () {
+  %target = alloca [1024 x sbyte]
+  %arg1 = getelementptr [1024 x sbyte]* %target, int 0, int 0
+  %arg2 = getelementptr [6 x sbyte]* %hello, int 0, int 0
+  %rslt = call sbyte* %strcat(sbyte* %arg1, sbyte* %arg2)
+  ret int 0
+}