diff --git a/src/dos/drive_cache.cpp b/src/dos/drive_cache.cpp
index e0500d30..9bd548e6 100644
--- a/src/dos/drive_cache.cpp
+++ b/src/dos/drive_cache.cpp
@@ -243,7 +243,7 @@ void DOS_Drive_Cache::AddEntryDirOverlay(const char* path, bool checkExists) {
 #if defined (WIN32) 
 		//OS2 ?
 		if (post > dironly && *(post - 1) == ':' && (post - dironly) == 2) 
-			post++; //move away from X: as need to end up with x:\ 
+			post++; //move away from X: as need to end up with x:\ .  
 #else
 	//Lets hope this is not really used.. (root folder specified as overlay)
 		if (post == dironly)
diff --git a/src/hardware/joystick.cpp b/src/hardware/joystick.cpp
index b6fe5c8c..f1dc22a1 100644
--- a/src/hardware/joystick.cpp
+++ b/src/hardware/joystick.cpp
@@ -67,7 +67,7 @@ struct JoyStick {
 	}
 
 	void transform_circular(){
-		float r = sqrt(xpos * xpos + ypos * ypos);
+		float r = sqrtf(xpos * xpos + ypos * ypos);
 		if (r == 0.0) {xfinal = xpos; yfinal = ypos; return;}
 		float deadzone_f = deadzone / 100.0f;
 		float s = 1.0f - deadzone_f;
@@ -77,8 +77,8 @@ struct JoyStick {
 		}
 
 		float deadzonescale = (r - deadzone_f) / s; //r if deadzone=0;
-		float xa = fabs(xpos);
-		float ya = fabs(ypos);
+		float xa = fabsf(xpos);
+		float ya = fabsf(ypos);
 		float maxpos = (ya>xa?ya:xa);
 		xfinal = xpos * deadzonescale/maxpos;
 		yfinal = ypos * deadzonescale/maxpos;
diff --git a/src/hardware/pcspeaker.cpp b/src/hardware/pcspeaker.cpp
index bde5ba02..9de948ef 100644
--- a/src/hardware/pcspeaker.cpp
+++ b/src/hardware/pcspeaker.cpp
@@ -278,7 +278,7 @@ static void PCSPEAKER_CallBack(Bitu len) {
 				index+=vol_len;
 			} else {
 				/* Check how long it will take to goto new level */
-				float vol_time=fabs(vol_diff)/SPKR_SPEED;
+				float vol_time=fabsf(vol_diff)/SPKR_SPEED;
 				if (vol_time<=vol_len) {
 					/* Volume reaches endpoint in this block, calc until that point */
 					value+=vol_time*spkr.volcur;