diff --git a/src/modules/physics/box2d/PrismaticJoint.cpp b/src/modules/physics/box2d/PrismaticJoint.cpp
index 276cb5493..d9b407a7d 100644
--- a/src/modules/physics/box2d/PrismaticJoint.cpp
+++ b/src/modules/physics/box2d/PrismaticJoint.cpp
@@ -90,6 +90,11 @@ namespace box2d
 	{
 		return Physics::scaleUp(joint->GetMotorForce(inv_dt));
 	}
+	
+	float PrismaticJoint::getMaxMotorForce() const
+	{
+		return Physics::scaleUp(joint->GetMaxMotorForce());
+	}
 
 	void PrismaticJoint::enableLimit(bool limit)
 	{
diff --git a/src/modules/physics/box2d/PrismaticJoint.h b/src/modules/physics/box2d/PrismaticJoint.h
index b7c5efeec..c267f4ec7 100644
--- a/src/modules/physics/box2d/PrismaticJoint.h
+++ b/src/modules/physics/box2d/PrismaticJoint.h
@@ -91,6 +91,11 @@ namespace box2d
 		**/
 		float getMotorForce(float inv_dt) const;
 
+		/**
+		* Get the maximum motor force, usually in N.
+		**/
+		float getMaxMotorForce() const;
+
 		/**
 		* Enable/disable the joint limit.
 		**/
diff --git a/src/modules/physics/box2d/RevoluteJoint.cpp b/src/modules/physics/box2d/RevoluteJoint.cpp
index 3beaa136c..30ef8ce14 100644
--- a/src/modules/physics/box2d/RevoluteJoint.cpp
+++ b/src/modules/physics/box2d/RevoluteJoint.cpp
@@ -88,7 +88,7 @@ namespace box2d
 		return Physics::scaleUp(Physics::scaleUp(joint->GetMotorTorque(inv_dt)));
 	}
 	
-	float RevoluteJoint::getMaxMotorTorque()
+	float RevoluteJoint::getMaxMotorTorque() const
 	{
 		return Physics::scaleUp(Physics::scaleUp(joint->GetMaxMotorTorque()));
 	}
diff --git a/src/modules/physics/box2d/RevoluteJoint.h b/src/modules/physics/box2d/RevoluteJoint.h
index 5c6c95096..2147b59e1 100644
--- a/src/modules/physics/box2d/RevoluteJoint.h
+++ b/src/modules/physics/box2d/RevoluteJoint.h
@@ -94,7 +94,7 @@ namespace box2d
 		/**
 		* Get the maximum motor torque, usually in N-m.
 		**/
-		float getMaxMotorTorque();
+		float getMaxMotorTorque() const;
 
 		/**
 		* Enable/disable the joint limit.
diff --git a/src/modules/physics/box2d/wrap_PrismaticJoint.cpp b/src/modules/physics/box2d/wrap_PrismaticJoint.cpp
index a09344a06..5d9d04953 100644
--- a/src/modules/physics/box2d/wrap_PrismaticJoint.cpp
+++ b/src/modules/physics/box2d/wrap_PrismaticJoint.cpp
@@ -90,6 +90,13 @@ namespace box2d
 		lua_pushnumber(L, t->getMotorForce(inv_dt));
 		return 1;
 	}
+	
+	int w_PrismaticJoint_getMaxMotorForce(lua_State * L)
+	{
+		PrismaticJoint * t = luax_checkprismaticjoint(L, 1);
+		lua_pushnumber(L, t->getMaxMotorForce());
+		return 1;
+	}
 
 	int w_PrismaticJoint_enableLimit(lua_State * L)
 	{
@@ -161,6 +168,7 @@ namespace box2d
 		{ "setMotorSpeed", w_PrismaticJoint_setMotorSpeed },
 		{ "getMotorSpeed", w_PrismaticJoint_getMotorSpeed },
 		{ "getMotorForce", w_PrismaticJoint_getMotorForce },
+		{ "getMaxMotorForce", w_PrismaticJoint_getMaxMotorForce },
 		{ "enableLimit", w_PrismaticJoint_enableLimit },
 		{ "isLimitEnabled", w_PrismaticJoint_isLimitEnabled },
 		{ "setUpperLimit", w_PrismaticJoint_setUpperLimit },
diff --git a/src/modules/physics/box2d/wrap_PrismaticJoint.h b/src/modules/physics/box2d/wrap_PrismaticJoint.h
index 203edaea7..3f7152338 100644
--- a/src/modules/physics/box2d/wrap_PrismaticJoint.h
+++ b/src/modules/physics/box2d/wrap_PrismaticJoint.h
@@ -41,6 +41,7 @@ namespace box2d
 	int w_PrismaticJoint_setMotorSpeed(lua_State * L);
 	int w_PrismaticJoint_getMotorSpeed(lua_State * L);
 	int w_PrismaticJoint_getMotorForce(lua_State * L);
+	int w_PrismaticJoint_getMaxMotorForce(lua_State * L);
 	int w_PrismaticJoint_enableLimit(lua_State * L);
 	int w_PrismaticJoint_isLimitEnabled(lua_State * L);
 	int w_PrismaticJoint_setUpperLimit(lua_State * L);