diff --git a/include/binder/MemoryHeapBase.h b/include/binder/MemoryHeapBase.h
index 435540e..d793c24 100644
--- a/include/binder/MemoryHeapBase.h
+++ b/include/binder/MemoryHeapBase.h
@@ -35,7 +35,8 @@
         MAP_ONCE = IMemoryHeap::MAP_ONCE,
         // memory won't be mapped locally, but will be mapped in the remote
         // process.
-        DONT_MAP_LOCALLY = 0x00000100
+        DONT_MAP_LOCALLY = 0x00000100,
+        NO_CACHING = 0x00000200
     };
 
     /* 
diff --git a/libs/binder/MemoryHeapBase.cpp b/libs/binder/MemoryHeapBase.cpp
index 5df078f..624f7eb 100644
--- a/libs/binder/MemoryHeapBase.cpp
+++ b/libs/binder/MemoryHeapBase.cpp
@@ -67,7 +67,11 @@
     : mFD(-1), mSize(0), mBase(MAP_FAILED), mFlags(flags),
       mDevice(0), mNeedUnmap(false)
 {
-    int fd = open(device, O_RDWR);
+    int open_flags = O_RDWR;
+    if (flags & NO_CACHING)
+        open_flags |= O_SYNC;
+
+    int fd = open(device, open_flags);
     LOGE_IF(fd<0, "error opening %s: %s", device, strerror(errno));
     if (fd >= 0) {
         const size_t pagesize = getpagesize();
diff --git a/libs/binder/MemoryHeapPmem.cpp b/libs/binder/MemoryHeapPmem.cpp
index 3806a42..c660947 100644
--- a/libs/binder/MemoryHeapPmem.cpp
+++ b/libs/binder/MemoryHeapPmem.cpp
@@ -132,7 +132,7 @@
     char const * const device = pmemHeap->getDevice();
 #if HAVE_ANDROID_OS
     if (device) {
-        int fd = open(device, O_RDWR);
+        int fd = open(device, O_RDWR | (flags & NO_CACHING ? O_SYNC : 0));
         LOGE_IF(fd<0, "couldn't open %s (%s)", device, strerror(errno));
         if (fd >= 0) {
             int err = ioctl(fd, PMEM_CONNECT, pmemHeap->heapID());