diff --git a/crates/mdbook-html/front-end/js/book.js b/crates/mdbook-html/front-end/js/book.js
index 62d7c4cc87..15426bace8 100644
--- a/crates/mdbook-html/front-end/js/book.js
+++ b/crates/mdbook-html/front-end/js/book.js
@@ -706,11 +706,21 @@ aria-label="Show hidden lines"></button>';
 
         // Usually needs the Shift key to be pressed
         switch (e.key) {
-        case '?':
+        case '?': {
+            const active = document.activeElement;
+            if (active &&
+                (
+                    active.tagName === 'INPUT' ||
+                    active.tagName === 'TEXTAREA' ||
+                    active.isContentEditable
+                )) {
+                return;
+            }
             e.preventDefault();
             showHelp();
             break;
         }
+        }
 
         // Rest of the keys are only active when the Shift key is not pressed
         if (e.shiftKey) {