diff --git a/src/main.rs b/src/main.rs
index 41bb397..82c8bdb 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,7 +2,7 @@ use image::{ImageBuffer, Rgb};
 use rayon::prelude::*;
 
 // Number of frames to generate.
-const FRAMES = 20;
+const FRAMES: u32 = 20;
 
 // Frame size.
 const IMGW: u32 = 1024;
@@ -14,8 +14,8 @@ const MAXITER_F64: f64 = MAXITER as f64;
 const ESCRAD: f64 = 2.4;
 
 // Target coordinates (what to "zoom in on" with each new frame.)
-const TARGX = -0.4638686756;
-const TARGX = 0.0723647;
+const TARGX: f64 = -0.4638686756;
+const TARGX: f64 = 0.0723647;
 
 fn main() {
     let w = IMGW as f64;