diff --git a/caca/driver_gl.c b/caca/driver_gl.c
index bf0fc57..a3eba7c 100644
--- a/caca/driver_gl.c
+++ b/caca/driver_gl.c
@@ -104,7 +104,7 @@ static int gl_init_graphics(caca_t *kk)
     gl_kk = kk;
 
     geometry = getenv("CACA_GEOMETRY");
-    if(geometry && *(geometry))
+    if(geometry && *geometry)
         sscanf(geometry, "%ux%u", &width, &height);
 
     if(width && height)
diff --git a/caca/driver_ncurses.c b/caca/driver_ncurses.c
index 1d01b8b..7d475ab 100644
--- a/caca/driver_ncurses.c
+++ b/caca/driver_ncurses.c
@@ -411,7 +411,7 @@ static RETSIGTYPE sigwinch_handler(int sig)
 {
     sigwinch_kk->resize.resized = 1;
 
-    signal(SIGWINCH, sigwinch_handler);;
+    signal(SIGWINCH, sigwinch_handler);
 }
 #endif
 
diff --git a/caca/driver_x11.c b/caca/driver_x11.c
index beabd51..1da0ee0 100644
--- a/caca/driver_x11.c
+++ b/caca/driver_x11.c
@@ -93,7 +93,7 @@ static int x11_init_graphics(caca_t *kk)
     kk->drv.p = malloc(sizeof(struct driver_private));
 
     geometry = getenv("CACA_GEOMETRY");
-    if(geometry && *(geometry))
+    if(geometry && *geometry)
         sscanf(geometry, "%ux%u", &width, &height);
 
     if(width && height)
diff --git a/src/cacaball.c b/src/cacaball.c
index a1f0b86..ec0835a 100644
--- a/src/cacaball.c
+++ b/src/cacaball.c
@@ -165,10 +165,10 @@ static void create_ball(void)
     for(y = 0; y < METASIZE; y++)
         for(x = 0; x < METASIZE; x++)
     {
-	distance = ((METASIZE/2) - x) * ((METASIZE/2) - x)
+        distance = ((METASIZE/2) - x) * ((METASIZE/2) - x)
                  + ((METASIZE/2) - y) * ((METASIZE/2) - y);
         distance = sqrt(distance) * 64 / METASIZE;
-	metaball[x + y * METASIZE] = distance > 15 ? 0 : (255 - distance) * 15;
+        metaball[x + y * METASIZE] = distance > 15 ? 0 : (255 - distance) * 15;
     }
 }