diff --git a/quazip/quazip/unzip.c b/quazip/quazip/unzip.c
index 3221808..bca03f8 100644
--- a/quazip/quazip/unzip.c
+++ b/quazip/quazip/unzip.c
@@ -1050,26 +1050,26 @@ local int unz64local_GetCurrentFileInfoInternal (unzFile file,
             {
                 uLong uL;
 
-                if(file_info.uncompressed_size == (ZPOS64_T)(unsigned long)-1)
+                if(file_info.uncompressed_size == (ZPOS64_T)0xFFFFFFFFu)
                 {
                     if (unz64local_getLong64(&s->z_filefunc, s->filestream,&file_info.uncompressed_size) != UNZ_OK)
                         err=UNZ_ERRNO;
                 }
 
-                if(file_info.compressed_size == (ZPOS64_T)(unsigned long)-1)
+                if(file_info.compressed_size == (ZPOS64_T)0xFFFFFFFFu)
                 {
                     if (unz64local_getLong64(&s->z_filefunc, s->filestream,&file_info.compressed_size) != UNZ_OK)
                         err=UNZ_ERRNO;
                 }
 
-                if(file_info_internal.offset_curfile == (ZPOS64_T)(unsigned long)-1)
+                if(file_info_internal.offset_curfile == (ZPOS64_T)0xFFFFFFFFu)
                 {
                     /* Relative Header offset */
                     if (unz64local_getLong64(&s->z_filefunc, s->filestream,&file_info_internal.offset_curfile) != UNZ_OK)
                         err=UNZ_ERRNO;
                 }
 
-                if(file_info.disk_num_start == (unsigned long)-1)
+                if(file_info.disk_num_start == 0xFFFFFFFFu)
                 {
                     /* Disk Start Number */
                     if (unz64local_getLong(&s->z_filefunc, s->filestream,&uL) != UNZ_OK)