diff --git a/native/fopen.c b/native/fopen.c
index 73b4054..a58a6a2 100644
--- a/native/fopen.c
+++ b/native/fopen.c
@@ -11,10 +11,9 @@ void labashka(unsigned short (*pop)(void), void (*push)(unsigned short), size_t
     char *filename = calloc(filenamelen, sizeof(char));
     for (short i = filenamelen - 1; i != -1; i--)
 	    filename[i] = pop();
-
     FILE *file = fopen(filename, mode);
-    push((short)((0xFFFF000000000000 & (long)file) >> (16*3) ));
-    push((short)((0x0000FFFF00000000 & (long)file) >> (16*2) ));
-    push((short)((0x00000000FFFF0000 & (long)file) >> (16*1) ));
-    push((short)((0x000000000000FFFF & (long)file) >> (16*0) ));
+    push((short)((0xFFFF000000000000 & (size_t)file) >> (16*3) ));
+    push((short)((0x0000FFFF00000000 & (size_t)file) >> (16*2) ));
+    push((short)((0x00000000FFFF0000 & (size_t)file) >> (16*1) ));
+    push((short)((0x000000000000FFFF & (size_t)file) >> (16*0) ));
 }