diff --git a/src/HID/HID.cpp b/src/HID/HID.cpp
index 758f899..a4b5fe4 100644
--- a/src/HID/HID.cpp
+++ b/src/HID/HID.cpp
@@ -265,9 +265,7 @@ bool HID_::setup(USBSetup& setup)
 	return false;
 }
 
-HID_::HID_(void) : PluggableUSBModule(2, 1, epType),
-                   rootNode(NULL), descriptorSize(0),
-                   protocol(HID_REPORT_PROTOCOL), idle(1)
+HID_::HID_(void) : PluggableUSBModule(2, 1, epType)
 {
 	epType[0] = EP_TYPE_INTERRUPT_IN;
         epType[1] = EP_TYPE_INTERRUPT_OUT;
diff --git a/src/HID/HID.h b/src/HID/HID.h
index ea1598c..1da6786 100644
--- a/src/HID/HID.h
+++ b/src/HID/HID.h
@@ -141,20 +141,19 @@ class HID_ : public PluggableUSBModule
 private:
     uint8_t epType[2];
 
-    HIDSubDescriptor* rootNode;
-    uint16_t descriptorSize;
+    HIDSubDescriptor* rootNode = nullptr;
+    uint16_t descriptorSize = 0;
 
-    uint8_t protocol;
-    uint8_t idle;
+    uint8_t protocol = HID_REPORT_PROTOCOL;
+    uint8_t idle = 1;
   
     // Buffer pointer to hold the feature data
-    HIDReport* rootReport;
+    HIDReport* rootReport = nullptr;
     uint16_t reportCount;
     
-    Serial_ *dbg;
-    
-    const char *serial;
+    Serial_ *dbg = nullptr;
     
+    const char *serial = nullptr; 
 };
 
 // Replacement for global singleton.