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diff --git a/test/Transforms/InstCombine/strpbrk-2.ll b/test/Transforms/InstCombine/strpbrk-2.ll
new file mode 100644
index 0000000000000..31ac2905df2c8
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+++ b/test/Transforms/InstCombine/strpbrk-2.ll
@@ -0,0 +1,23 @@
+; Test that the strpbrk library call simplifier works correctly.
+;
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
+
+@hello = constant [12 x i8] c"hello world\00"
+@w = constant [2 x i8] c"w\00"
+
+declare i16* @strpbrk(i8*, i8*)
+
+; Check that 'strpbrk' functions with the wrong prototype aren't simplified.
+
+define i16* @test_no_simplify1() {
+; CHECK: @test_no_simplify1
+  %str = getelementptr [12 x i8]* @hello, i32 0, i32 0
+  %pat = getelementptr [2 x i8]* @w, i32 0, i32 0
+
+  %ret = call i16* @strpbrk(i8* %str, i8* %pat)
+; CHECK-NEXT: %ret = call i16* @strpbrk
+  ret i16* %ret
+; CHECK-NEXT: ret i16* %ret
+}