--- OLD/pbm/pbmtoatk.c	Thu Jan  1 00:00:00 1970
+++ NEW/pbm/pbmtoatk.c	Thu Jan  1 00:00:00 1970
@@ -107,10 +107,7 @@
     exit( 0 );
   }
 
-write_atk_bytes (file, curbyte, curcount)
-     FILE *file;
-     unsigned char curbyte;
-     unsigned int curcount;
+int write_atk_bytes(FILE *file, unsigned char curbyte, unsigned int curcount)
 {
     /* codes for data stream */
 #define WHITEZERO	'f'
@@ -157,12 +154,7 @@
   }
 }
 
-process_atk_byte (pcurcount, pcurbyte, file, newbyte, eolflag)
-int *pcurcount;
-unsigned char *pcurbyte;
-FILE *file;
-unsigned char newbyte;
-int eolflag;
+int process_atk_byte(int *pcurcount, unsigned char *pcurbyte, FILE *file, unsigned char newbyte, int eolflag)
 {
     int curcount = *pcurcount;
     unsigned char curbyte = *pcurbyte;