diff --git a/defs.h b/defs.h
index 14e4653..4f6bbd9 100644
--- a/defs.h
+++ b/defs.h
@@ -419,9 +419,9 @@
 extern void get_regs(pid_t pid);
 extern int get_scno(struct tcb *tcp);
 
-extern int umoven(struct tcb *, long, unsigned int, char *);
+extern int umoven(struct tcb *, long, unsigned int, void *);
 #define umove(pid, addr, objp)	\
-	umoven((pid), (addr), sizeof(*(objp)), (char *) (objp))
+	umoven((pid), (addr), sizeof(*(objp)), (void *) (objp))
 extern int umovestr(struct tcb *, long, unsigned int, char *);
 extern int upeek(int pid, long, long *);
 #if defined(SPARC) || defined(SPARC64) || defined(IA64) || defined(SH)