diff --git a/layouts/mandel/mandel.html b/layouts/mandel/mandel.html
index 23aa1f7..0e3a4ef 100644
--- a/layouts/mandel/mandel.html
+++ b/layouts/mandel/mandel.html
@@ -62,7 +62,7 @@ <h2 class="fw1 f5 f3-l white-80 measure-wide-l center lh-copy mt3 mb4 {{ with $.
                        type="number" min="-1.0" max="1.000" step="0.005"
                        value="-0.080"
                        aria-describedby="y-start-desc">
-                <small id="y-start-desc" class="f6 black-60 dib mb2">Minimum value for X.</small>
+                <small id="y-start-desc" class="f6 black-60 dib mb2">Minimum value for Y.</small>
             </div>
             <div class="measure dib w-40">
                 <label for="y-end" class="f6 b dib mb2">Y <span class="normal black-60">(max)</span></label>
@@ -70,7 +70,7 @@ <h2 class="fw1 f5 f3-l white-80 measure-wide-l center lh-copy mt3 mb4 {{ with $.
                        type="number" min="-1.000" max="1.000" step="0.005"
                        value="0.080"
                        aria-describedby="x-end-desc">
-                <small id="y-end-desc" class="w-100 f6 black-60 dib mb2">Maximum value for X.</small>
+                <small id="y-end-desc" class="w-100 f6 black-60 dib mb2">Maximum value for Y.</small>
             </div>
 
             <div class="measure dib w-100">