diff --git a/source/src/weapon.cpp b/source/src/weapon.cpp
index 63d107a2..c40580ee 100644
--- a/source/src/weapon.cpp
+++ b/source/src/weapon.cpp
@@ -692,6 +692,8 @@ void grenadeent::onmoved(const vec &dist)
 
 grenades::grenades(playerent *owner) : weapon(owner, GUN_GRENADE), inhandnade(NULL), throwwait((13*1000)/40), throwmillis(0), state(GST_NONE) {}
 
+int grenades::flashtime() const { return 0; }
+
 bool grenades::busy() { return state!=GST_NONE; }
 
 bool grenades::attack(vec &targ)
@@ -1008,6 +1010,8 @@ bool akimbo::timerout() { return akimbomillis && akimbomillis <= lastmillis; }
 
 knife::knife(playerent *owner) : weapon(owner, GUN_KNIFE) {}
 
+int knife::flashtime() const { return 0; }
+
 bool knife::attack(vec &targ)
 {
     int attackmillis = lastmillis-owner->lastaction;
diff --git a/source/src/weapon.h b/source/src/weapon.h
index 96490df8..0c4fdb09 100644
--- a/source/src/weapon.h
+++ b/source/src/weapon.h
@@ -45,7 +45,7 @@ struct weapon
 
     static bool valid(int id);
 
-    int flashtime() const;
+    virtual int flashtime() const;
 };
 
 struct grenadeent;
@@ -74,6 +74,7 @@ struct grenades : weapon
     bool busy();
     void onselecting();
     void onownerdies();
+    int flashtime() const;
 };
 
 
@@ -168,5 +169,7 @@ struct knife : weapon
     void drawstats();
     void attackfx(const vec &from, const vec &to, int millis);
     void renderstats();
+    
+    int flashtime() const;
 };