diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b0d43498a38..9f25d92e6fe 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2013-09-16  James Greenhalgh  <james.greenhalgh@arm.com>
+
+	* config/aarch64/arm_neon.h
+	(vcvtx_high_f32_f64): Fix parameters.
+
 2013-09-16  Jan-Benedict Glaw  <jbglaw@lug-owl.de>
 
 	* config/alpha.c: Include tree-ssa.h.
diff --git a/gcc/config/aarch64/arm_neon.h b/gcc/config/aarch64/arm_neon.h
index c7e882a3d23..23b11167913 100644
--- a/gcc/config/aarch64/arm_neon.h
+++ b/gcc/config/aarch64/arm_neon.h
@@ -5756,12 +5756,12 @@ vcvtx_f32_f64 (float64x2_t a)
 }
 
 __extension__ static __inline float32x4_t __attribute__ ((__always_inline__))
-vcvtx_high_f32_f64 (float64x2_t a)
+vcvtx_high_f32_f64 (float32x2_t a, float64x2_t b)
 {
   float32x4_t result;
   __asm__ ("fcvtxn2 %0.4s,%1.2d"
            : "=w"(result)
-           : "w"(a)
+           : "w" (b), "0"(a)
            : /* No clobbers */);
   return result;
 }