diff --git a/source/core/gameinput.cpp b/source/core/gameinput.cpp
index 2f0fe8fe2..e5ffb4d06 100644
--- a/source/core/gameinput.cpp
+++ b/source/core/gameinput.cpp
@@ -91,6 +91,29 @@ lookangle getincanglebam(binangle a, binangle na)
 	return bamlook(newa-cura);
 }
 
+//---------------------------------------------------------------------------
+//
+// Functions for determining whether its turbo turn time (turn key held for a number of tics).
+//
+//---------------------------------------------------------------------------
+
+static double turnheldtime;
+
+void updateTurnHeldAmt(double const scaleAdjust)
+{
+	turnheldtime += scaleAdjust * (120. / GameTicRate);
+}
+
+bool const isTurboTurnTime()
+{
+	return turnheldtime >= 590. / GameTicRate;
+}
+
+void resetTurnHeldAmt()
+{
+	turnheldtime = 0;
+}
+
 //---------------------------------------------------------------------------
 //
 // Player's movement function, called from game's ticker or from gi->GetInput() as required.
@@ -170,9 +193,6 @@ void processMovement(InputPacket* currInput, InputPacket* inputBuffer, ControlIn
 	}
 	else
 	{
-		static double turnheldtime;
-		int const turnheldamt = 120 / GameTicRate;
-		double const turboturntime = 590. / GameTicRate;
 		double turnamount = hidspeed * turnscale;
 		double preambleturn = turnamount * (750. / 2776.);
 
@@ -184,17 +204,17 @@ void processMovement(InputPacket* currInput, InputPacket* inputBuffer, ControlIn
 
 		if (buttonMap.ButtonDown(gamefunc_Turn_Left) || (buttonMap.ButtonDown(gamefunc_Strafe_Left) && !allowstrafe))
 		{
-			turnheldtime += scaleAdjust * turnheldamt;
-			currInput->avel -= scaleAdjust * (turnheldtime >= turboturntime ? turnamount : preambleturn);
+			updateTurnHeldAmt(scaleAdjust);
+			currInput->avel -= scaleAdjust * (isTurboTurnTime() ? turnamount : preambleturn);
 		}
 		else if (buttonMap.ButtonDown(gamefunc_Turn_Right) || (buttonMap.ButtonDown(gamefunc_Strafe_Right) && !allowstrafe))
 		{
-			turnheldtime += scaleAdjust * turnheldamt;
-			currInput->avel += scaleAdjust * (turnheldtime >= turboturntime ? turnamount : preambleturn);
+			updateTurnHeldAmt(scaleAdjust);
+			currInput->avel += scaleAdjust * (isTurboTurnTime() ? turnamount : preambleturn);
 		}
 		else
 		{
-			turnheldtime = 0;
+			resetTurnHeldAmt();
 		}
 	}
 
diff --git a/source/core/gameinput.h b/source/core/gameinput.h
index fa6ff6390..357febc07 100644
--- a/source/core/gameinput.h
+++ b/source/core/gameinput.h
@@ -269,6 +269,10 @@ class FSerializer;
 FSerializer& Serialize(FSerializer& arc, const char* keyname, PlayerAngle& w, PlayerAngle* def);
 FSerializer& Serialize(FSerializer& arc, const char* keyname, PlayerHorizon& w, PlayerHorizon* def);
 
+
+void updateTurnHeldAmt(double const scaleAdjust);
+bool const isTurboTurnTime();
+void resetTurnHeldAmt();
 void processMovement(InputPacket* currInput, InputPacket* inputBuffer, ControlInfo* const hidInput, double const scaleAdjust, int const drink_amt = 0, bool const allowstrafe = true, double const turnscale = 1);
 void sethorizon(fixedhoriz* horiz, float const horz, ESyncBits* actions, double const scaleAdjust = 1);
 void applylook(PlayerAngle* angle, float const avel, ESyncBits* actions, double const scaleAdjust = 1);