diff --git a/mandelbrot.c b/mandelbrot.c
index 46b4725..6b4997c 100644
--- a/mandelbrot.c
+++ b/mandelbrot.c
@@ -34,7 +34,7 @@ void drawmandelbrot(SDL_Surface *surface) {
       z = cpowf(z, 2) + c;
 
       /* If |z| ever gets greater than 2, it diverges. */
-      if (cabs(z) > 2) {
+      if (cabsf(z) > 2) {
         diverges = true;
         break;
       }