diff --git a/libraries/platform/src/platform/backend/PlatformInstance.cpp b/libraries/platform/src/platform/backend/PlatformInstance.cpp
index 038521d398..d4cadba3b7 100644
--- a/libraries/platform/src/platform/backend/PlatformInstance.cpp
+++ b/libraries/platform/src/platform/backend/PlatformInstance.cpp
@@ -107,7 +107,8 @@ void Instance::enumerateNics() {
 
 json Instance::getCPU(int index) {
     assert(index <(int) _cpus.size());
-    if (index >= (int)_cpus.size())
+
+    if (index < 0 || (int) _cpus.size() <= index)
         return json();
 
     return _cpus.at(index);
@@ -116,7 +117,7 @@ json Instance::getCPU(int index) {
 json Instance::getGPU(int index) {
     assert(index <(int) _gpus.size());
 
-    if (index >=(int) _gpus.size())
+    if (index < 0 || (int) _gpus.size() <= index)
         return json();
     
     return _gpus.at(index);
@@ -126,7 +127,7 @@ json Instance::getGPU(int index) {
 json Instance::getDisplay(int index) {
     assert(index <(int) _displays.size());
     
-    if (index >=(int) _displays.size())
+    if (index < 0 || (int) _displays.size() <= index)
         return json();
 
     return _displays.at(index);