diff --git a/src/eprintf.c b/src/eprintf.c
index e6aac5d..8db4e97 100644
--- a/src/eprintf.c
+++ b/src/eprintf.c
@@ -71,7 +71,7 @@ V_FUNC init_tty (NO_PARAM)
 
 V_FUNC eprintf (s,a,b,c,d,e,f,g,h,i,j)
 char *s;                        /* format string                */
-long a,b,c,d,e,f,g,h,i,j;        /* dummy arguments              */
+unsigned long a,b,c,d,e,f,g,h,i,j;        /* dummy arguments              */
 {
     fflush (stdout);            /* flush standard output stream */
 
@@ -98,7 +98,7 @@ long a,b,c,d,e,f,g,h,i,j;        /* dummy arguments              */
 
 V_FUNC eprintf2 (s,a,b,c,d,e,f,g,h,i,j)
 char *s;                        /* format string                */
-long a,b,c,d,e,f,g,h,i,j;        /* dummy arguments              */
+unsigned long a,b,c,d,e,f,g,h,i,j;        /* dummy arguments              */
 {
     fflush (stdout);            /* flush standard output stream */
 
@@ -150,7 +150,7 @@ MODPRIV V_FUNC z_msg(t_flag,pf,s,a,b,c,d,e,f,g,h,i,j)
 int t_flag;                     /* terminate-caller flag        */
 char *pf;                       /* prefix pointer (or NULL)     */
 char *s;                        /* format string                */
-long a,b,c,d,e,f,g,h,i,j;        /* dummy arguments              */
+unsigned long a,b,c,d,e,f,g,h,i,j;        /* dummy arguments              */
 {
     if ((pf != NULLCP) && (*pf != CH_EOS)) eprintf2 ("%s",pf);
     eprintf2 (s,a,b,c,d,e,f,g,h,i,j);
@@ -175,7 +175,7 @@ long a,b,c,d,e,f,g,h,i,j;        /* dummy arguments              */
 
 V_FUNC x_warn(s,a,b,c,d,e,f,g,h,i,j)
 char *s;                        /* format string                */
-long a,b,c,d,e,f,g,h,i,j;        /* dummy arguments              */
+unsigned long a,b,c,d,e,f,g,h,i,j;        /* dummy arguments              */
 {
     z_msg (FALSE, "Warning: ", s,a,b,c,d,e,f,g,h,i,j);
 }
@@ -222,7 +222,7 @@ long a,b,c,d,e,f,g,h,i,j;        /* dummy arguments              */
 
 V_FUNC x_panic (s,a,b,c,d,e,f,g,h,i,j)
 char *s;                        /* format string                */
-long a,b,c,d,e,f,g,h,i,j;        /* dummy arguments              */
+unsigned long a,b,c,d,e,f,g,h,i,j;        /* dummy arguments              */
 {
     z_msg (TRUE, "Internal error: ",
         s,a,b,c,d,e,f,g,h,i,j);