diff --git a/codecs/rotate/rotate.rs b/codecs/rotate/rotate.rs
index f17bbcc2..d1b19f01 100644
--- a/codecs/rotate/rotate.rs
+++ b/codecs/rotate/rotate.rs
@@ -23,7 +23,7 @@ impl<T> HardUnwrap<T> for Option<T> {
 }
 
 #[no_mangle]
-fn rotate(width: usize, height: usize, _rotate: usize) {
+fn rotate(width: usize, height: usize, rotate: usize) {
     let num_pixels = width * height;
     let in_b: &mut [u32];
     let out_b: &mut [u32];
@@ -32,14 +32,26 @@ fn rotate(width: usize, height: usize, _rotate: usize) {
         out_b = from_raw_parts_mut::<u32>((num_pixels * 4 + 8) as *mut u32, num_pixels);
     }
 
-    let new_width = height;
-    let _new_height = width;
-    for y in 0..height {
-        for x in 0..width {
-            let new_x = (new_width - 1) - y;
-            let new_y = x;
-            *out_b.get_mut(new_y * new_width + new_x).unwrap_hard() =
-                *in_b.get(y * width + x).unwrap_hard();
+    match rotate {
+        0 => {
+            for i in 0..num_pixels {
+                *out_b.get_mut(i).unwrap_hard() = *in_b.get(i).unwrap_hard();
+            }
         }
+        90 => {
+            let new_width = height;
+            let _new_height = width;
+            for y in 0..height {
+                for x in 0..width {
+                    let new_x = (new_width - 1) - y;
+                    let new_y = x;
+                    *out_b.get_mut(new_y * new_width + new_x).unwrap_hard() =
+                        *in_b.get(y * width + x).unwrap_hard();
+                }
+            }
+        }
+        180 => std::process::abort(),
+        270 => std::process::abort(),
+        _ => std::process::abort(),
     }
 }
diff --git a/codecs/rotate/rotate.wasm b/codecs/rotate/rotate.wasm
index 92547dc9..d7514e8e 100755
Binary files a/codecs/rotate/rotate.wasm and b/codecs/rotate/rotate.wasm differ