diff --git a/src/base/atomicops-internals-arm-v6plus.h b/src/base/atomicops-internals-arm-v6plus.h
index 0aa6fdb..a23153c 100644
--- a/src/base/atomicops-internals-arm-v6plus.h
+++ b/src/base/atomicops-internals-arm-v6plus.h
@@ -110,7 +110,7 @@ inline Atomic32 Acquire_AtomicExchange(volatile Atomic32* ptr,
   return old_value;
 }
 
-inline Atomic64 Release_AtomicExchange(volatile Atomic32* ptr,
+inline Atomic32 Release_AtomicExchange(volatile Atomic32* ptr,
                                        Atomic32 new_value) {
   MemoryBarrier();
   return NoBarrier_AtomicExchange(ptr, new_value);