diff --git a/ril/libril/ril.cpp b/ril/libril/ril.cpp
index 2b36513..c8dab21 100644
--- a/ril/libril/ril.cpp
+++ b/ril/libril/ril.cpp
@@ -23,6 +23,7 @@
 #include <telephony/ril_cdma_sms.h>
 #include <cutils/sockets.h>
 #include <cutils/jstring.h>
+#include <hwbinder/ProcessState.h>
 #include <telephony/record_stream.h>
 #include <utils/Log.h>
 #include <utils/SystemClock.h>
@@ -56,6 +57,10 @@ RIL_onRequestComplete(RIL_Token t, RIL_Errno e, void *response, size_t responsel
 
 extern "C" void
 RIL_onRequestAck(RIL_Token t);
+
+extern "C" void
+initWithMmapSize();
+
 namespace android {
 
 #define PHONE_PROCESS "radio"
@@ -85,6 +90,9 @@ namespace android {
 // request, response, and unsolicited msg print macro
 #define PRINTBUF_SIZE 8096
 
+// Set hwbinder buffer size to 512KB
+#define HW_BINDER_MMAP_SIZE 524288
+
 enum WakeType {DONT_WAKE, WAKE_PARTIAL};
 
 typedef struct {
@@ -1244,4 +1252,9 @@ rilSocketIdToString(RIL_SOCKET_ID socket_id)
     }
 }
 
+extern "C" void
+initWithMmapSize() {
+    android::hardware::ProcessState::initWithMmapSize((size_t)(HW_BINDER_MMAP_SIZE));
+}
+
 } /* namespace android */