diff --git a/libexternal/external.cpp b/libexternal/external.cpp
index 1c8f170..883a39f 100644
--- a/libexternal/external.cpp
+++ b/libexternal/external.cpp
@@ -450,7 +450,7 @@
 bool ExternalDisplay::closeFrameBuffer()
 {
     int ret = 0;
-    if(mFd > 0) {
+    if(mFd >= 0) {
         ret = close(mFd);
         mFd = -1;
     }
diff --git a/libhwcomposer/hwc_utils.cpp b/libhwcomposer/hwc_utils.cpp
index 093c0b3..a011f9b 100644
--- a/libhwcomposer/hwc_utils.cpp
+++ b/libhwcomposer/hwc_utils.cpp
@@ -390,11 +390,11 @@
         if(list->hwLayers[i].compositionType == HWC_OVERLAY ||
            list->hwLayers[i].compositionType == HWC_FRAMEBUFFER_TARGET) {
             //Close the acquireFenceFds
-            if(list->hwLayers[i].acquireFenceFd > 0) {
+            if(list->hwLayers[i].acquireFenceFd >= 0) {
                 close(list->hwLayers[i].acquireFenceFd);
                 list->hwLayers[i].acquireFenceFd = -1;
             }
-            if(fd > 0) {
+            if(fd >= 0) {
                 close(fd);
                 fd = -1;
             }