diff --git a/aegisub/universalchardet/CharDistribution.h b/aegisub/universalchardet/CharDistribution.h
index 724d4bf1d..3a4c3c454 100644
--- a/aegisub/universalchardet/CharDistribution.h
+++ b/aegisub/universalchardet/CharDistribution.h
@@ -46,6 +46,7 @@ class CharDistributionAnalysis
 {
 public:
   CharDistributionAnalysis() {Reset();};
+  virtual ~CharDistributionAnalysis() {};
 
   //feed a block of data and do distribution analysis
   void HandleData(const char* aBuf, PRUint32 aLen) {};
diff --git a/aegisub/universalchardet/JpCntx.h b/aegisub/universalchardet/JpCntx.h
index 08e0511c4..1ca9cd5eb 100644
--- a/aegisub/universalchardet/JpCntx.h
+++ b/aegisub/universalchardet/JpCntx.h
@@ -52,6 +52,7 @@ class JapaneseContextAnalysis
 {
 public:
   JapaneseContextAnalysis() {Reset();};
+  virtual ~JapaneseContextAnalysis() {};
 
   void HandleData(const char* aBuf, PRUint32 aLen);