@@ -80,7 +80,7 @@ 
 /* extern */
 
 void
-drawall() {
+drawall(void) {
 	Client *c;
 
 	for(c = clients; c; c = getnext(c->next))
@@ -89,7 +89,7 @@ drawstatus();
 }
 
 void
-drawstatus() {
+drawstatus(void) {
 	int i, x;
 
 	dc.x = dc.y = 0;

@@ -121,16 +121,16 @@ extern void updatetitle(Client *c);		/* update the name of c */
 extern void unmanage(Client *c);		/* destroy c */
 
 /* draw.c */
-extern void drawall();				/* draw all visible client titles and the bar */
-extern void drawstatus();			/* draw the bar */
+extern void drawall(void);			/* draw all visible client titles and the bar */
+extern void drawstatus(void);			/* draw the bar */
 extern void drawtitle(Client *c);		/* draw title of c */
 extern unsigned long getcolor(const char *colstr);	/* return color of colstr */
 extern void setfont(const char *fontstr);	/* set the font for DC */
 extern unsigned int textw(const char *text);	/* return the width of text in px*/
 
 /* event.c */
-extern void grabkeys();				/* grab all keys defined in config.h */
-extern void procevent();			/* process pending X events */
+extern void grabkeys(void);			/* grab all keys defined in config.h */
+extern void procevent(void);			/* process pending X events */
 
 /* main.c */
 extern int getproto(Window w);			/* return protocol mask of WMProtocols property of w */
@@ -139,7 +139,7 @@ extern void sendevent(Window w, Atom a, long value);	/* send synthetic event to w */
 extern int xerror(Display *dsply, XErrorEvent *ee);	/* dwm's X error handler */
 
 /* tag.c */
-extern void initrregs();			/* initialize regexps of rules defined in config.h */
+extern void initrregs(void);			/* initialize regexps of rules defined in config.h */
 extern Client *getnext(Client *c);		/* returns next visible client */
 extern Client *getprev(Client *c);		/* returns previous visible client */
 extern void settags(Client *c, Client *trans);	/* sets tags of c */
@@ -160,7 +160,7 @@ extern void focusnext(Arg *arg);		/* focuses next visible client, arg is ignored  */
 extern void focusprev(Arg *arg);		/* focuses previous visible client, arg is ignored */
 extern Bool isvisible(Client *c);		/* returns True if client is visible */
 extern void resizecol(Arg *arg);		/* resizes the master width with arg's index value */
-extern void restack();				/* restores z layers of all clients */
+extern void restack(void);			/* restores z layers of all clients */
 extern void togglemode(Arg *arg);		/* toggles global arrange function (dotile/dofloat) */
 extern void toggleview(Arg *arg);		/* toggles the tag with arg's index (in)visible */
 extern void view(Arg *arg);			/* views the tag with arg's index */

@@ -170,13 +170,13 @@ focus(c);
 		if(CLEANMASK(ev->state) != MODKEY)
 			return;
 		if(ev->button == Button1 && (arrange == dofloat || c->isfloat)) {
-			restack(c);
+			restack();
 			movemouse(c);
 		}
 		else if(ev->button == Button2)
 			zoom(NULL);
 		else if(ev->button == Button3 && (arrange == dofloat || c->isfloat)) {
-			restack(c);
+			restack();
 			resizemouse(c);
 		}
 	}
@@ -388,7 +388,7 @@ [UnmapNotify] = unmapnotify
 };
 
 void
-grabkeys() {
+grabkeys(void) {
 	static unsigned int len = sizeof(key) / sizeof(key[0]);
 	unsigned int i;
 	KeyCode code;
@@ -408,7 +408,7 @@ }
 }
 
 void
-procevent() {
+procevent(void) {
 	XEvent ev;
 
 	while(XPending(dpy)) {

@@ -38,7 +38,7 @@ static int (*xerrorxlib)(Display *, XErrorEvent *);
 static Bool otherwm, readin;
 
 static void
-cleanup() {
+cleanup(void) {
 	close(STDIN_FILENO);
 	while(sel) {
 		resize(sel, True, TopLeft);
@@ -58,7 +58,7 @@ free(seltag);
 }
 
 static void
-scan() {
+scan(void) {
 	unsigned int i, num;
 	Window *wins, d1, d2;
 	XWindowAttributes wa;
@@ -79,7 +79,7 @@ XFree(wins);
 }
 
 static void
-setup() {
+setup(void) {
 	int i, j;
 	unsigned int mask;
 	Window w;

@@ -45,7 +45,7 @@ return c;
 }
 
 void
-initrregs() {
+initrregs(void) {
 	unsigned int i;
 	regex_t *reg;
 

@@ -7,7 +7,7 @@ 
 /* static */
 
 static Client *
-minclient() {
+minclient(void) {
 	Client *c, *min;
 
 	if((clients && clients->isfloat) || arrange == dofloat)
@@ -25,7 +25,7 @@ return c;
 }
 
 static void
-reorder() {
+reorder(void) {
 	Client *c, *newclients, *tail;
 
 	newclients = tail = NULL;
@@ -225,7 +225,7 @@ arrange(NULL);
 }
 
 void
-restack() {
+restack(void) {
 	Client *c;
 	XEvent ev;