diff --git a/app/TerminalView.m b/app/TerminalView.m
index a1eeba926e..b27d02568e 100644
--- a/app/TerminalView.m
+++ b/app/TerminalView.m
@@ -31,7 +31,9 @@ - (void)userContentController:(WKUserContentController *)userContentController d
 }
 @end
 
-@interface TerminalView ()
+@interface TerminalView () {
+    CGFloat _prevScrollY;
+}
 
 @property (nonatomic) NSMutableArray<UIKeyCommand *> *keyCommands;
 @property ScrollbarView *scrollbarView;
@@ -104,6 +106,7 @@ - (void)setTerminal:(Terminal *)terminal {
     }
 
     _terminal = terminal;
+    _prevScrollY = 0;
     [_terminal addObserver:self forKeyPath:@"loaded" options:NSKeyValueObservingOptionInitial context:nil];
     if (_terminal.loaded)
         [self installTerminalView];
@@ -268,7 +271,12 @@ - (void)userContentController:(WKUserContentController *)userContentController d
 }
 
 - (void)scrollViewDidScroll:(UIScrollView *)scrollView {
-    [self.terminal.webView evaluateJavaScript:[NSString stringWithFormat:@"exports.newScrollTop(%f)", scrollView.contentOffset.y] completionHandler:nil];
+    CGFloat newY = scrollView.contentOffset.y;
+    [self.terminal.webView evaluateJavaScript:[NSString stringWithFormat:@"exports.newScrollTop(%f)", newY] completionHandler:nil];
+    CGFloat delta = newY - _prevScrollY;
+    _prevScrollY = newY;
+    if (delta != 0)
+        [self.terminal.webView evaluateJavaScript:[NSString stringWithFormat:@"exports.handleScrollDelta(%f)", delta] completionHandler:nil];
 }
 
 - (void)setKeyboardAppearance:(UIKeyboardAppearance)keyboardAppearance {
diff --git a/app/terminal/term.js b/app/terminal/term.js
index 300fe6e128..ae4916f990 100644
--- a/app/terminal/term.js
+++ b/app/terminal/term.js
@@ -154,6 +154,27 @@ exports.getCharacterSize = () => {
 };
 
 exports.clearScrollback = () => term.clearScrollback();
+
+// Forward scroll delta as synthetic WheelEvents into hterm's onMouse_ pipeline.
+let scrollDeltaRemainder = 0;
+exports.handleScrollDelta = (delta) => {
+    if (term.vt.mouseReport === term.vt.MOUSE_REPORT_DISABLED && term.isPrimaryScreen())
+        return;
+    const charH = term.scrollPort_.characterSize.height;
+    if (!charH) return;
+    scrollDeltaRemainder += delta;
+    const lines = Math.trunc(scrollDeltaRemainder / charH);
+    if (lines === 0) return;
+    scrollDeltaRemainder -= lines * charH;
+    for (let i = 0; i < Math.abs(lines); i++) {
+        term.scrollPort_.screen_.dispatchEvent(new WheelEvent('wheel', {
+            deltaY: lines > 0 ? 1 : -1,
+            deltaMode: WheelEvent.DOM_DELTA_LINE,
+            cancelable: true,
+        }));
+    }
+};
+
 exports.setUserGesture = () => term.accessibilityReader_.hasUserGesture = true;
 
 hterm.openUrl = (url) => native.openLink(url);