diff --git a/lib/Target/ARM/ARMCallingConv.td b/lib/Target/ARM/ARMCallingConv.td
index 5bc429b3b7e..bda1517685b 100644
--- a/lib/Target/ARM/ARMCallingConv.td
+++ b/lib/Target/ARM/ARMCallingConv.td
@@ -160,6 +160,9 @@ def RetCC_ARM_AAPCS : CallingConv<[
 //===----------------------------------------------------------------------===//
 
 def CC_ARM_AAPCS_VFP : CallingConv<[
+  // Handles byval parameters.
+  CCIfByVal<CCPassByVal<4, 4>>,
+
   // Handle all vector types as either f64 or v2f64.
   CCIfType<[v1i64, v2i32, v4i16, v8i8, v2f32], CCBitConvertToType<f64>>,
   CCIfType<[v2i64, v4i32, v8i16, v16i8, v4f32], CCBitConvertToType<v2f64>>,