7 files changed, 17 insertions, 0 deletions
diff --git a/src/vehicles/Automobile.h b/src/vehicles/Automobile.h
index 041302bf..16d1a2ef 100644
--- a/src/vehicles/Automobile.h
+++ b/src/vehicles/Automobile.h
@@ -197,7 +197,9 @@ public:
 	static void SetAllTaxiLights(bool set);
 };
 
+#ifdef CHECK_STRUCT_SIZES 
 static_assert(sizeof(CAutomobile) == 0x5A8, "CAutomobile: error");
+#endif
 
 inline uint8 GetCarDoorFlag(int32 carnode) {
 	switch (carnode) {
diff --git a/src/vehicles/Boat.h b/src/vehicles/Boat.h
index 70407ab9..014b1e48 100644
--- a/src/vehicles/Boat.h
+++ b/src/vehicles/Boat.h
@@ -72,7 +72,9 @@ public:
 
 };
 
+#ifdef CHECK_STRUCT_SIZES 
 static_assert(sizeof(CBoat) == 0x484, "CBoat: error");
+#endif
 
 extern float MAX_WAKE_LENGTH;
 extern float MIN_WAKE_INTERVAL;
diff --git a/src/vehicles/Cranes.h b/src/vehicles/Cranes.h
index c0502638..4d4c8fb4 100644
--- a/src/vehicles/Cranes.h
+++ b/src/vehicles/Cranes.h
@@ -72,7 +72,9 @@ public:
 	float GetHeightToDropoffHeight() { return m_fDropoffHeight + (m_bIsCrusher ? 7.0f : 2.0f); }
 };
 
+#ifdef CHECK_STRUCT_SIZES 
 static_assert(sizeof(CCrane) == 128, "CCrane: error");
+#endif
 
 class CCranes
 {
diff --git a/src/vehicles/Heli.h b/src/vehicles/Heli.h
index 39e4cbcf..d41afb58 100644
--- a/src/vehicles/Heli.h
+++ b/src/vehicles/Heli.h
@@ -95,4 +95,7 @@ public:
 
 	static void ActivateHeli(bool activate);
 };
+
+#ifdef CHECK_STRUCT_SIZES 
 static_assert(sizeof(CHeli) == 0x33C, "CHeli: error");
+#endif
diff --git a/src/vehicles/Plane.h b/src/vehicles/Plane.h
index 79738858..f0c5902b 100644
--- a/src/vehicles/Plane.h
+++ b/src/vehicles/Plane.h
@@ -63,7 +63,10 @@ public:
 	static bool HasCesnaBeenDestroyed(void);
 	static bool HasDropOffCesnaBeenShotDown(void);
 };
+
+#ifdef CHECK_STRUCT_SIZES 
 static_assert(sizeof(CPlane) == 0x29C, "CPlane: error");
+#endif
 
 extern float LandingPoint;
 extern float TakeOffPoint;
diff --git a/src/vehicles/Train.h b/src/vehicles/Train.h
index bf541250..6fb73169 100644
--- a/src/vehicles/Train.h
+++ b/src/vehicles/Train.h
@@ -91,4 +91,7 @@ public:
 		float *totalLength, float *totalDuration, CTrainInterpolationLine *interpLines, bool rightRail);
 	static void UpdateTrains(void);
 };
+
+#ifdef CHECK_STRUCT_SIZES 
 static_assert(sizeof(CTrain) == 0x2E4, "CTrain: error");
+#endif
+\ No newline at end of file
diff --git a/src/vehicles/Vehicle.h b/src/vehicles/Vehicle.h
index 110ff97c..d8891628 100644
--- a/src/vehicles/Vehicle.h
+++ b/src/vehicles/Vehicle.h
@@ -291,9 +291,11 @@ public:
 	static bool m_bDisableMouseSteering;
 };
 
+#ifdef CHECK_STRUCT_SIZES
 static_assert(sizeof(CVehicle) == 0x288, "CVehicle: error");
 static_assert(offsetof(CVehicle, m_pCurGroundEntity) == 0x1E0, "CVehicle: error");
 static_assert(offsetof(CVehicle, m_nAlarmState) == 0x1A0, "CVehicle: error");
 static_assert(offsetof(CVehicle, m_nLastWeaponDamage) == 0x228, "CVehicle: error");
+#endif
 
 void DestroyVehicleAndDriverAndPassengers(CVehicle* pVehicle);