diff --git a/simon.h b/simon.h
index c94df6d7..606c3b74 100644
--- a/simon.h
+++ b/simon.h
@@ -115,7 +115,7 @@ public:
     {
     public:
         std::string AlgorithmName() const {
-            return StaticAlgorithmName() + "(" + IntToString(sizeof(word64)*8) + ")";
+            return StaticAlgorithmName() + "(" + IntToString(m_kwords*sizeof(word64)*8) + ")";
         }
 
     protected:
diff --git a/speck.h b/speck.h
index b4092689..68074957 100644
--- a/speck.h
+++ b/speck.h
@@ -115,7 +115,7 @@ public:
     {
     public:
         std::string AlgorithmName() const {
-            return StaticAlgorithmName() + "(" + IntToString(sizeof(word64)*8) + ")";
+            return StaticAlgorithmName() + "(" + IntToString(m_kwords*sizeof(word64)*8) + ")";
         }
 
     protected: