diff --git a/test/CFrontend/2005-07-20-SqrtNoErrno.c b/test/CFrontend/2005-07-20-SqrtNoErrno.c
new file mode 100644
index 00000000000..fd976a67933
--- /dev/null
+++ b/test/CFrontend/2005-07-20-SqrtNoErrno.c
@@ -0,0 +1,7 @@
+// RUN: %llvmgcc %s -S -o - -fno-math-errno | gccas | llvm-dis | grep llvm.sqrt
+#include <math.h>
+
+float foo(float X) {
+  // Check that this compiles to llvm.sqrt when errno is ignored.
+  return sqrtf(X);
+}