diff --git a/src/g_shared/a_quake.cpp b/src/g_shared/a_quake.cpp
index d02b12890f..1d11171254 100644
--- a/src/g_shared/a_quake.cpp
+++ b/src/g_shared/a_quake.cpp
@@ -37,8 +37,8 @@ DEarthquake::DEarthquake()
 
 DEarthquake::DEarthquake(AActor *center, int intensityX, int intensityY, int intensityZ, int duration,
 	int damrad, int tremrad, FSoundID quakesound, int flags,
-	double waveSpeedX, double waveSpeedY, double waveSpeedZ, int falloff, int highpoint, int rollIntensity,
-	double rollWave)
+	double waveSpeedX, double waveSpeedY, double waveSpeedZ, int falloff, int highpoint, 
+	double rollIntensity, double rollWave)
 	: DThinker(STAT_EARTHQUAKE)
 {
 	m_QuakeSFX = quakesound;
@@ -351,7 +351,7 @@ int DEarthquake::StaticGetQuakeIntensities(AActor *victim, FQuakeJiggers &jigger
 bool P_StartQuakeXYZ(AActor *activator, int tid, int intensityX, int intensityY, int intensityZ, int duration,
 	int damrad, int tremrad, FSoundID quakesfx, int flags,
 	double waveSpeedX, double waveSpeedY, double waveSpeedZ, int falloff, int highpoint, 
-	int rollIntensity, double rollWave)
+	double rollIntensity, double rollWave)
 {
 	AActor *center;
 	bool res = false;
diff --git a/src/g_shared/a_sharedglobal.h b/src/g_shared/a_sharedglobal.h
index 783abc87f0..f873ab0b7d 100644
--- a/src/g_shared/a_sharedglobal.h
+++ b/src/g_shared/a_sharedglobal.h
@@ -164,7 +164,7 @@ class DEarthquake : public DThinker
 public:
 	DEarthquake(AActor *center, int intensityX, int intensityY, int intensityZ, int duration,
 		int damrad, int tremrad, FSoundID quakesfx, int flags, 
-		double waveSpeedX, double waveSpeedY, double waveSpeedZ, int falloff, int highpoint, int rollIntensity, double rollWave);
+		double waveSpeedX, double waveSpeedY, double waveSpeedZ, int falloff, int highpoint, double rollIntensity, double rollWave);
 
 	void Serialize (FArchive &arc);
 	void Tick ();
diff --git a/src/p_spec.h b/src/p_spec.h
index 28c73914e2..125b2374eb 100644
--- a/src/p_spec.h
+++ b/src/p_spec.h
@@ -698,7 +698,7 @@ void P_DoDeferedScripts (void);
 //
 // [RH] p_quake.c
 //
-bool P_StartQuakeXYZ(AActor *activator, int tid, int intensityX, int intensityY, int intensityZ, int duration, int damrad, int tremrad, FSoundID quakesfx, int flags, double waveSpeedX, double waveSpeedY, double waveSpeedZ, int falloff, int highpoint, int rollIntensity, double rollWave);
+bool P_StartQuakeXYZ(AActor *activator, int tid, int intensityX, int intensityY, int intensityZ, int duration, int damrad, int tremrad, FSoundID quakesfx, int flags, double waveSpeedX, double waveSpeedY, double waveSpeedZ, int falloff, int highpoint, double rollIntensity, double rollWave);
 bool P_StartQuake(AActor *activator, int tid, int intensity, int duration, int damrad, int tremrad, FSoundID quakesfx);
 
 #endif
diff --git a/src/thingdef/thingdef_codeptr.cpp b/src/thingdef/thingdef_codeptr.cpp
index fe464b1371..34a9cf02cc 100644
--- a/src/thingdef/thingdef_codeptr.cpp
+++ b/src/thingdef/thingdef_codeptr.cpp
@@ -4985,7 +4985,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_QuakeEx)
 	PARAM_FLOAT_OPT(mulWaveZ) { mulWaveZ = 1.; }
 	PARAM_INT_OPT(falloff) { falloff = 0; }
 	PARAM_INT_OPT(highpoint) { highpoint = 0; }
-	PARAM_INT_OPT(rollIntensity) { rollIntensity = 0; }
+	PARAM_FLOAT_OPT(rollIntensity) { rollIntensity = 0.; }
 	PARAM_FLOAT_OPT(rollWave) { rollWave = 0.; }
 	P_StartQuakeXYZ(self, 0, intensityX, intensityY, intensityZ, duration, damrad, tremrad, sound, flags, mulWaveX, mulWaveY, mulWaveZ, falloff, highpoint, 
 		rollIntensity, rollWave);
diff --git a/wadsrc/static/actors/actor.txt b/wadsrc/static/actors/actor.txt
index b6543cd7eb..8b35be30d0 100644
--- a/wadsrc/static/actors/actor.txt
+++ b/wadsrc/static/actors/actor.txt
@@ -281,7 +281,7 @@ ACTOR Actor native //: Thinker
 	native void A_SetUserArrayFloat(name varname, int index, float value);
 	native void A_SetSpecial(int spec, int arg0 = 0, int arg1 = 0, int arg2 = 0, int arg3 = 0, int arg4 = 0);
 	native void A_Quake(int intensity, int duration, int damrad, int tremrad, sound sfx = "world/quake");
-	native void A_QuakeEx(int intensityX, int intensityY, int intensityZ, int duration, int damrad, int tremrad, sound sfx = "world/quake", int flags = 0, float mulWaveX = 1, float mulWaveY = 1, float mulWaveZ = 1, int falloff = 0, int highpoint = 0, int rollIntensity = 0, float rollWave = 0);
+	native void A_QuakeEx(int intensityX, int intensityY, int intensityZ, int duration, int damrad, int tremrad, sound sfx = "world/quake", int flags = 0, float mulWaveX = 1, float mulWaveY = 1, float mulWaveZ = 1, int falloff = 0, int highpoint = 0, float rollIntensity = 0, float rollWave = 0);
 	action native A_SetTics(int tics);
 	native void A_SetDamageType(name damagetype);
 	native void A_DropItem(class<Actor> item, int dropamount = -1, int chance = 256);