diff --git a/test/MC/ARM/coproc-diag.s b/test/MC/ARM/coproc-diag.s
new file mode 100644
index 00000000000..c96f2db6b6e
--- /dev/null
+++ b/test/MC/ARM/coproc-diag.s
@@ -0,0 +1,10 @@
+# Special test to make sure we don't error on VFP co-proc access
+@ RUN: llvm-mc -triple=armv5 < %s | FileCheck %s
+@ RUN: llvm-mc -triple=armv6 < %s | FileCheck %s
+
+        @ p10 and p11 are reserved for NEON, but accessible on v5/v6
+        ldc  p10, cr0, [r0], {0x20}
+        ldc2 p11, cr0, [r0], {0x21}
+        ldcl p11, cr0, [r0], {0x20}
+
+@ CHECK-NOT: error: invalid operand for instruction