diff --git a/source/games/duke/src/player_d.cpp b/source/games/duke/src/player_d.cpp
index 8f054dabd..b86681a8a 100644
--- a/source/games/duke/src/player_d.cpp
+++ b/source/games/duke/src/player_d.cpp
@@ -1893,7 +1893,7 @@ static void movement(int snum, ESyncBits actions, int psect, int fz, int cz, int
 			}
 			else
 			{
-				p->poszv -= bsin(128 + p->jumping_counter) / 12;
+				p->poszv -= bsin(2048 - 128 + p->jumping_counter) / 12;
 				p->jumping_counter += 180;
 				p->on_ground = 0;
 			}
diff --git a/source/games/duke/src/player_r.cpp b/source/games/duke/src/player_r.cpp
index 2e2bcde57..794da0ff9 100644
--- a/source/games/duke/src/player_r.cpp
+++ b/source/games/duke/src/player_r.cpp
@@ -2268,7 +2268,7 @@ static void movement(int snum, ESyncBits actions, int psect, int fz, int cz, int
 			}
 			else
 			{
-				p->poszv -= bsin(128 + p->jumping_counter) / 12;
+				p->poszv -= bsin(2048 - 128 + p->jumping_counter) / 12;
 				p->jumping_counter += 180;
 				p->on_ground = 0;
 			}