diff --git a/libs/binder/IPCThreadState.cpp b/libs/binder/IPCThreadState.cpp
index cfb86f0..7c45c77 100644
--- a/libs/binder/IPCThreadState.cpp
+++ b/libs/binder/IPCThreadState.cpp
@@ -465,7 +465,7 @@
 
 void IPCThreadState::flushCommands()
 {
-    if (mProcess->mDriverFD <= 0)
+    if (mProcess->mDriverFD < 0)
         return;
     talkWithDriver(false);
     // The flush could have caused post-write refcount decrements to have
@@ -618,7 +618,7 @@
 
 int IPCThreadState::setupPolling(int* fd)
 {
-    if (mProcess->mDriverFD <= 0) {
+    if (mProcess->mDriverFD < 0) {
         return -EBADF;
     }
 
@@ -924,7 +924,7 @@
 
 status_t IPCThreadState::talkWithDriver(bool doReceive)
 {
-    if (mProcess->mDriverFD <= 0) {
+    if (mProcess->mDriverFD < 0) {
         return -EBADF;
     }
 
@@ -982,7 +982,7 @@
 #else
         err = INVALID_OPERATION;
 #endif
-        if (mProcess->mDriverFD <= 0) {
+        if (mProcess->mDriverFD < 0) {
             err = -EBADF;
         }
         IF_LOG_COMMANDS() {
@@ -1301,7 +1301,7 @@
         if (self) {
                 self->flushCommands();
 #if defined(__ANDROID__)
-        if (self->mProcess->mDriverFD > 0) {
+        if (self->mProcess->mDriverFD >= 0) {
             ioctl(self->mProcess->mDriverFD, BINDER_THREAD_EXIT, 0);
         }
 #endif