diff --git a/Library/Group.h b/Library/Group.h
index cd84ea3a..e547c13b 100644
--- a/Library/Group.h
+++ b/Library/Group.h
@@ -22,7 +22,7 @@
 #include <string>
 #include <unordered_set>
 
-class CGroup
+class __declspec(novtable) CGroup
 {
 public:
 	virtual ~CGroup() {}
diff --git a/Library/Measure.h b/Library/Measure.h
index 5387b2c4..0cec2143 100644
--- a/Library/Measure.h
+++ b/Library/Measure.h
@@ -52,7 +52,7 @@ class CMeter;
 class CMeterWindow;
 class CConfigParser;
 
-class CMeasure : public CSection
+class __declspec(novtable) CMeasure : public CSection
 {
 public:
 	virtual ~CMeasure();
diff --git a/Library/Meter.h b/Library/Meter.h
index 4520dd5f..547516a7 100644
--- a/Library/Meter.h
+++ b/Library/Meter.h
@@ -31,7 +31,7 @@
 
 class CMeasure;
 
-class CMeter : public CSection
+class __declspec(novtable) CMeter : public CSection
 {
 public:
 	virtual ~CMeter();
diff --git a/Library/Section.h b/Library/Section.h
index 2b97348e..addbd4ba 100644
--- a/Library/Section.h
+++ b/Library/Section.h
@@ -26,7 +26,7 @@
 class CMeterWindow;
 class CConfigParser;
 
-class CSection : public CGroup
+class __declspec(novtable) CSection : public CGroup
 {
 public:
 	virtual ~CSection();
diff --git a/Plugins/PluginNowPlaying/Player.h b/Plugins/PluginNowPlaying/Player.h
index 16a7a72f..6f9d000d 100644
--- a/Plugins/PluginNowPlaying/Player.h
+++ b/Plugins/PluginNowPlaying/Player.h
@@ -54,7 +54,7 @@ enum MeasureType
 	MEASURE_YEAR     = 0x00010000
 };
 
-class CPlayer
+class __declspec(novtable) CPlayer
 {
 public:
 	CPlayer();