diff --git a/code/aliens.cpp b/code/aliens.cpp
index 1af2860..3061065 100644
--- a/code/aliens.cpp
+++ b/code/aliens.cpp
@@ -801,8 +801,8 @@ void moveAndSeparate(object *theEnemy)
 				theEnemy->dy -= 0.02;
 			}
 
-			theEnemy->x -= (sin(theEnemy->dx) * 4);
-			theEnemy->y -= (cos(theEnemy->dy) * 4);
+			theEnemy->x -= (sinf(theEnemy->dx) * 4);
+			theEnemy->y -= (cosf(theEnemy->dy) * 4);
 		}
 		else
 		{
@@ -899,8 +899,8 @@ void moveAndSeparate(object *theEnemy)
 					theEnemy->dy += 0.02;
 				}
 
-				theEnemy->x += (sin(theEnemy->dx) * 4);
-				theEnemy->y += (cos(theEnemy->dy) * 4);
+				theEnemy->x += (sinf(theEnemy->dx) * 4);
+				theEnemy->y += (cosf(theEnemy->dy) * 4);
 
 				theEnemy->thinktime = 0;
 			}
@@ -1090,8 +1090,8 @@ void doAliens()
 
 				if (theEnemy->classDef == CD_BARRIER)
 				{
-					theEnemy->dx = -10 + (sin(barrierLoop + theEnemy->speed) * 60);
-					theEnemy->dy = 20 + (cos(barrierLoop + theEnemy->speed) * 40);
+					theEnemy->dx = -10 + (sinf(barrierLoop + theEnemy->speed) * 60);
+					theEnemy->dy = 20 + (cosf(barrierLoop + theEnemy->speed) * 40);
 				}
 
 				// ----------------------------------------
diff --git a/code/bullets.cpp b/code/bullets.cpp
index c5f23f0..8866a76 100644
--- a/code/bullets.cpp
+++ b/code/bullets.cpp
@@ -46,7 +46,7 @@ void addBullet(object *theWeapon, object *attacker, int y, int dy)
 	{
 		bullet->dx = theWeapon->speed;
 		if ((currentGame.area == 18) || (currentGame.area == 24))
-			bullet->dx += fabs(engine.ssx);
+			bullet->dx += fabsf(engine.ssx);
 	}
 	else
 	{
@@ -106,8 +106,8 @@ void addBullet(object *theWeapon, object *attacker, int y, int dy)
 
 	if (bullet->flags & WF_AIMED)
 	{
-		tempX = (int)fabs(attacker->target->x - attacker->x);
-		tempY = (int)fabs(attacker->target->y - attacker->y);
+		tempX = (int)fabsf(attacker->target->x - attacker->x);
+		tempY = (int)fabsf(attacker->target->y - attacker->y);
 		steps = max(tempX, tempY);
 
 		if (steps < 12)
@@ -392,8 +392,8 @@ char checkPlayerShockDamage(float x, float y)
 	if ((engine.cheatShield) || (engine.missionCompleteTimer != 0))
 		return 0;
 
-	float distX = fabs(x - player.x);
-	float distY = fabs(y - player.y);
+	float distX = fabsf(x - player.x);
+	float distY = fabsf(y - player.y);
 
 	if ((distX <= 50) && (distY <= 50))
 	{
diff --git a/code/intermission.cpp b/code/intermission.cpp
index f4f1ee7..3a0720e 100644
--- a/code/intermission.cpp
+++ b/code/intermission.cpp
@@ -256,8 +256,8 @@ signed char showSystem(float x, float y)
 
 		graphics.circle(400, 250, i, graphics.screen, graphics.darkGrey);
 
-		r.x = int(400 + (sin(x) * i));
-		r.y = int(250 + (cos(y) * i));
+		r.x = int(400 + (sinf(x) * i));
+		r.y = int(250 + (cosf(y) * i));
 		r.w = 10;
 		r.h = 10;