diff --git a/util/ass/ass00.c b/util/ass/ass00.c
index 193e04a00..db3d07ba0 100644
--- a/util/ass/ass00.c
+++ b/util/ass/ass00.c
@@ -49,8 +49,8 @@ main(argc, argv)
 }
 
 getcore() {
-	register size_t *p;
-	size_t bytes;
+	register siz_t *p;
+	siz_t bytes;
 	register unsigned n ;
 	register char *base ;
 
diff --git a/util/ass/ass00.h b/util/ass/ass00.h
index 9b84cce4e..5f48c283b 100644
--- a/util/ass/ass00.h
+++ b/util/ass/ass00.h
@@ -63,7 +63,7 @@ typedef struct loc_label        locl_t;
 typedef struct glob_label       glob_t;
 typedef struct rel              relc_t;
 typedef struct procstat         stat_t;
-typedef struct sizes            size_t;
+typedef struct sizes            siz_t;
 typedef struct ar_hdr           arch_t;
 typedef struct procs            proc_t;
 typedef struct proctab          ptab_t;
diff --git a/util/ass/assda.c b/util/ass/assda.c
index 0712aec9c..d757608f4 100644
--- a/util/ass/assda.c
+++ b/util/ass/assda.c
@@ -127,11 +127,11 @@ char    *progname;                      /* argv[0] */
 char    *curfile        =  0;           /* name of current file */
 char    *eout           =  "e.out";
 arch_t  archhdr;
-size_t  sizes[NDEFAULT] = {
+siz_t  sizes[NDEFAULT] = {
 /*   mlab, glab,mproc,xproc, proc */
     { 151,   29,   31,   73,  130 },
     { 307,  127,  151,  401,  460 },
     { 601,  251,  151,  401,  600 },
     {1601, 1601, 1601, 1601, 2000 }
 };
-size_t  *oursize        =  &sizes[1] ;  /* point to selected sizes */
+siz_t  *oursize        =  &sizes[1] ;  /* point to selected sizes */
diff --git a/util/ass/assex.h b/util/ass/assex.h
index 1379036e1..02a66e6ea 100644
--- a/util/ass/assex.h
+++ b/util/ass/assex.h
@@ -47,7 +47,7 @@ extern  char    string[];
  */
 extern  glob_t  *lastglosym;
 extern  glob_t  *curglosym;
-extern  size_t  *oursize;
+extern  siz_t  *oursize;
 extern  relc_t  *f_data;
 extern  relc_t  *l_data;
 extern  relc_t  *f_text;
@@ -109,7 +109,7 @@ extern  char    *progname;
 extern  char    *curfile;
 extern  char    *eout;
 extern  arch_t  archhdr;
-extern  size_t  sizes[];
+extern  siz_t  sizes[];
 
 extern  char    linesize[];