diff --git a/neo/d3xp/script/Script_Interpreter.cpp b/neo/d3xp/script/Script_Interpreter.cpp
index b14b903b..643884a1 100644
--- a/neo/d3xp/script/Script_Interpreter.cpp
+++ b/neo/d3xp/script/Script_Interpreter.cpp
@@ -785,11 +785,22 @@ void idInterpreter::CallEvent( const function_t *func, int argsize ) {
 		switch( format[ i ] ) {
 		case D_EVENT_INTEGER :
 			var.intPtr = ( int * )&localstack[ start + pos ];
-			( *( int * )&data[ i ] ) = int( *var.floatPtr );
+			//( *( int * )&data[ i ] ) = int( *var.floatPtr );
+			// DG: for int/intrptr_t arguments, the callbacks from Callbacks.cpp pass
+			//     data[i] directly, not *(int*)&data[i] or some nonsense like that
+			//     so the integer must be assigned to the intptr_t for the value to be
+			//     passed correctly, esp. on 64bit Big Endian machines.
+			data[ i ] = int( *var.floatPtr );
 			break;
 
 		case D_EVENT_FLOAT :
 			var.intPtr = ( int * )&localstack[ start + pos ];
+			// NOTE: floats are the only type not passed as int or pointer in intptr_t,
+			//       but as float-data in the first 4 bytes of data[i].
+			//       So (unlike in the other cases), here this awkward code casting &data[i]
+			//       to another pointer type is actually necessary (same in CallSysEvent()).
+			//       In the other cases one could also use `data[i] = (intptr_t)var.blaPtr;`
+			//       (not doing those changes here now to minimize potential merge conflicts)
 			( *( float * )&data[ i ] ) = *var.floatPtr;
 			break;
 
@@ -915,7 +926,12 @@ void idInterpreter::CallSysEvent( const function_t *func, int argsize ) {
 		switch( format[ i ] ) {
 		case D_EVENT_INTEGER :
 			source.intPtr = ( int * )&localstack[ start + pos ];
-			*( int * )&data[ i ] = int( *source.floatPtr );
+			//*( int * )&data[ i ] = int( *source.floatPtr );
+			// DG: for int/intrptr_t arguments, the callbacks from Callbacks.cpp pass
+			//     data[i] directly, not *(int*)&data[i] or some nonsense like that
+			//     so the integer must be assigned to the intptr_t for the value to be
+			//     passed correctly, esp. on 64bit Big Endian machines.
+			data[ i ] = int( *source.floatPtr );
 			break;
 
 		case D_EVENT_FLOAT :
diff --git a/neo/game/script/Script_Interpreter.cpp b/neo/game/script/Script_Interpreter.cpp
index 48668d3e..6da5bdf2 100644
--- a/neo/game/script/Script_Interpreter.cpp
+++ b/neo/game/script/Script_Interpreter.cpp
@@ -785,11 +785,22 @@ void idInterpreter::CallEvent( const function_t *func, int argsize ) {
 		switch( format[ i ] ) {
 		case D_EVENT_INTEGER :
 			var.intPtr = ( int * )&localstack[ start + pos ];
-			( *( int * )&data[ i ] ) = int( *var.floatPtr );
+			//( *( int * )&data[ i ] ) = int( *var.floatPtr );
+			// DG: for int/intrptr_t arguments, the callbacks from Callbacks.cpp pass
+			//     data[i] directly, not *(int*)&data[i] or some nonsense like that
+			//     so the integer must be assigned to the intptr_t for the value to be
+			//     passed correctly, esp. on 64bit Big Endian machines.
+			data[ i ] = int( *var.floatPtr );
 			break;
 
 		case D_EVENT_FLOAT :
 			var.intPtr = ( int * )&localstack[ start + pos ];
+			// NOTE: floats are the only type not passed as int or pointer in intptr_t,
+			//       but as float-data in the first 4 bytes of data[i].
+			//       So (unlike in the other cases), here this awkward code casting &data[i]
+			//       to another pointer type is actually necessary (same in CallSysEvent()).
+			//       In the other cases one could also use `data[i] = (intptr_t)var.blaPtr;`
+			//       (not doing those changes here now to minimize potential merge conflicts)
 			( *( float * )&data[ i ] ) = *var.floatPtr;
 			break;
 
@@ -915,7 +926,12 @@ void idInterpreter::CallSysEvent( const function_t *func, int argsize ) {
 		switch( format[ i ] ) {
 		case D_EVENT_INTEGER :
 			source.intPtr = ( int * )&localstack[ start + pos ];
-			*( int * )&data[ i ] = int( *source.floatPtr );
+			//*( int * )&data[ i ] = int( *source.floatPtr );
+			// DG: for int/intrptr_t arguments, the callbacks from Callbacks.cpp pass
+			//     data[i] directly, not *(int*)&data[i] or some nonsense like that
+			//     so the integer must be assigned to the intptr_t for the value to be
+			//     passed correctly, esp. on 64bit Big Endian machines.
+			data[ i ] = int( *source.floatPtr );
 			break;
 
 		case D_EVENT_FLOAT :