diff --git a/source/src/entity.h b/source/src/entity.h
index 4cb42a8b..dc0f312d 100644
--- a/source/src/entity.h
+++ b/source/src/entity.h
@@ -101,13 +101,14 @@ struct physent
     float radius, eyeheight, maxeyeheight, aboveeye;  // bounding box size
     bool inwater;
     bool onfloor, onladder, jumpnext, crouching, trycrouch, cancollide, stuck;
+    int lastjump;
     int lastsplash;
     char move, strafe;
     uchar state, type;
     float eyeheightvel;
 
     physent() : o(0, 0, 0), deltapos(0, 0, 0), newpos(0, 0, 0), yaw(270), pitch(0), roll(0), pitchvel(0),
-                crouching(false), trycrouch(false), cancollide(true), stuck(false), lastsplash(0), state(CS_ALIVE)
+                crouching(false), trycrouch(false), cancollide(true), stuck(false), lastjump(0), lastsplash(0), state(CS_ALIVE)
     {
         reset();
     }
@@ -124,7 +125,7 @@ struct physent
     {
         vel.x = vel.y = vel.z = eyeheightvel = 0.0f;
         move = strafe = 0;
-        timeinair = lastsplash = 0;
+        timeinair = lastjump = lastsplash = 0;
         onfloor = onladder = inwater = jumpnext = crouching = trycrouch = stuck = false;
     }
 
diff --git a/source/src/physics.cpp b/source/src/physics.cpp
index 879f3a89..2259edfb 100644
--- a/source/src/physics.cpp
+++ b/source/src/physics.cpp
@@ -427,9 +427,19 @@ void moveplayer(physent *pl, int moveres, bool local, int curtime)
                         if(pl->jumpnext)
                         {
                             pl->jumpnext = false;
-                            pl->vel.z = 2.0f;                                  // physics impulse upwards
-                            if(water) { pl->vel.x /= 8; pl->vel.y /= 8; }      // dampen velocity change even harder, gives correct water feel
+                            pl->vel.z = 2.0f; // physics impulse upwards
+                            bool doublejump = pl->lastjump && lastmillis-pl->lastjump < 250 && pl->strafe != 0;
+                            if(doublejump) // more velocity on double jump
+                            {
+                                pl->vel.mul(1.25f);
+                            }
+                            if(water) // dampen velocity change even harder, gives correct water feel
+                            { 
+                                pl->vel.x /= 8.0f; 
+                                pl->vel.y /= 8.0f; 
+                            }      
                             else if(pl==player1 || pl->type!=ENT_PLAYER) audiomgr.playsoundc(S_JUMP, pl);
+                            pl->lastjump = lastmillis;
                         }
                         pl->timeinair = 0;
                     }