--- a/src/unzip.c
+++ b/src/unzip.c
@@ -493,7 +493,7 @@
 /*
   Get Info about the current file in the zipfile, with internal only info
 */
-local int unzlocal_GetCurrentFileInfoInternal OF((unzFile file,
+local int unzlocal_GetCurrentFileInfoInternal _Z_OF((unzFile file,
                                                   unz_file_info *pfile_info,
                                                   unz_file_info_internal 
                                                   *pfile_info_internal,
--- a/src/unzip.h
+++ b/src/unzip.h
@@ -8,7 +8,7 @@
    Encryption and multi volume ZipFile (span) are not supported.
    Old compressions used by old PKZip 1.x are not supported
 
-   THIS IS AN ALPHA VERSION. AT THIS STAGE OF DEVELOPPEMENT, SOMES API OR STRUCTURE
+   THIS IS AN ALPHA VERSION. AT THIS STAGE _Z_OF DEVELOPPEMENT, SOMES API OR STRUCTURE
    CAN CHANGE IN FUTURE VERSION !!
    I WAIT FEEDBACK at mail info@winimage.com
    Visit also http://www.winimage.com/zLibDll/unzip.htm for evolution
@@ -111,7 +111,7 @@
     tm_unz tmu_date;
 } unz_file_info;
 
-extern int ZEXPORT unzStringFileNameCompare OF ((const char* fileName1,
+extern int ZEXPORT unzStringFileNameCompare _Z_OF ((const char* fileName1,
 												 const char* fileName2,
 												 int iCaseSensitivity));
 /*
@@ -124,7 +124,7 @@
 */
 
 
-extern unzFile ZEXPORT unzOpen OF((const char *path));
+extern unzFile ZEXPORT unzOpen _Z_OF((const char *path));
 /*
   Open a Zip file. path contain the full pathname (by example,
      on a Windows NT computer "c:\\zlib\\zlib111.zip" or on an Unix computer
@@ -135,14 +135,14 @@
 	   of this unzip package.
 */
 
-extern int ZEXPORT unzClose OF((unzFile file));
+extern int ZEXPORT unzClose _Z_OF((unzFile file));
 /*
   Close a ZipFile opened with unzipOpen.
   If there is files inside the .Zip opened with unzOpenCurrentFile (see later),
     these files MUST be closed with unzipCloseCurrentFile before call unzipClose.
   return UNZ_OK if there is no problem. */
 
-extern int ZEXPORT unzGetGlobalInfo OF((unzFile file,
+extern int ZEXPORT unzGetGlobalInfo _Z_OF((unzFile file,
 					unz_global_info *pglobal_info));
 /*
   Write info about the ZipFile in the *pglobal_info structure.
@@ -150,7 +150,7 @@
   return UNZ_OK if there is no problem. */
 
 
-extern int ZEXPORT unzGetGlobalComment OF((unzFile file,
+extern int ZEXPORT unzGetGlobalComment _Z_OF((unzFile file,
 										   char *szComment,
 					   uLong uSizeBuf));
 /*
@@ -163,20 +163,20 @@
 /***************************************************************************/
 /* Unzip package allow you browse the directory of the zipfile */
 
-extern int ZEXPORT unzGoToFirstFile OF((unzFile file));
+extern int ZEXPORT unzGoToFirstFile _Z_OF((unzFile file));
 /*
   Set the current file of the zipfile to the first file.
   return UNZ_OK if there is no problem
 */
 
-extern int ZEXPORT unzGoToNextFile OF((unzFile file));
+extern int ZEXPORT unzGoToNextFile _Z_OF((unzFile file));
 /*
   Set the current file of the zipfile to the next file.
   return UNZ_OK if there is no problem
   return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.
 */
 
-extern int ZEXPORT unzLocateFile OF((unzFile file, 
+extern int ZEXPORT unzLocateFile _Z_OF((unzFile file, 
 				     const char *szFileName,
 				     int iCaseSensitivity));
 /*
@@ -189,7 +189,7 @@
 */
 
 
-extern int ZEXPORT unzGetCurrentFileInfo OF((unzFile file,
+extern int ZEXPORT unzGetCurrentFileInfo _Z_OF((unzFile file,
 					     unz_file_info *pfile_info,
 					     char *szFileName,
 					     uLong fileNameBufferSize,
@@ -215,20 +215,20 @@
    from it, and close it (you can close it before reading all the file)
    */
 
-extern int ZEXPORT unzOpenCurrentFile OF((unzFile file));
+extern int ZEXPORT unzOpenCurrentFile _Z_OF((unzFile file));
 /*
   Open for reading data the current file in the zipfile.
   If there is no error, the return value is UNZ_OK.
 */
 
-extern int ZEXPORT unzCloseCurrentFile OF((unzFile file));
+extern int ZEXPORT unzCloseCurrentFile _Z_OF((unzFile file));
 /*
   Close the file in zip opened with unzOpenCurrentFile
   Return UNZ_CRCERROR if all the file was read but the CRC is not good
 */
 
 												
-extern int ZEXPORT unzReadCurrentFile OF((unzFile file, 
+extern int ZEXPORT unzReadCurrentFile _Z_OF((unzFile file, 
 					  voidp buf,
 					  unsigned len));
 /*
@@ -242,17 +242,17 @@
     (UNZ_ERRNO for IO error, or zLib error for uncompress error)
 */
 
-extern z_off_t ZEXPORT unztell OF((unzFile file));
+extern z_off_t ZEXPORT unztell _Z_OF((unzFile file));
 /*
   Give the current position in uncompressed data
 */
 
-extern int ZEXPORT unzeof OF((unzFile file));
+extern int ZEXPORT unzeof _Z_OF((unzFile file));
 /*
   return 1 if the end of file was reached, 0 elsewhere 
 */
 
-extern int ZEXPORT unzGetLocalExtrafield OF((unzFile file,
+extern int ZEXPORT unzGetLocalExtrafield _Z_OF((unzFile file,
 											 voidp buf,
 											 unsigned len));
 /*