diff --git a/packages/frontend/src/components/MkUserPopup.vue b/packages/frontend/src/components/MkUserPopup.vue
index c6f4699b3e..4ae23de62c 100644
--- a/packages/frontend/src/components/MkUserPopup.vue
+++ b/packages/frontend/src/components/MkUserPopup.vue
@@ -119,7 +119,7 @@ onMounted(() => {
 	}
 
 	const rect = props.source.getBoundingClientRect();
-	const x = ((rect.left + (props.source.offsetWidth / 2)) - (300 / 2)) + window.scrollX;
+	const x = Math.max(1, ((rect.left + (props.source.offsetWidth / 2)) - (300 / 2)) + window.scrollX);
 	const y = rect.top + props.source.offsetHeight + window.scrollY;
 
 	top.value = y;
diff --git a/packages/frontend/src/scripts/popup-position.ts b/packages/frontend/src/scripts/popup-position.ts
index 3dad41a8b3..be49532cf8 100644
--- a/packages/frontend/src/scripts/popup-position.ts
+++ b/packages/frontend/src/scripts/popup-position.ts
@@ -15,6 +15,8 @@ export function calcPopupPosition(el: HTMLElement, props: {
 	const contentWidth = el.offsetWidth;
 	const contentHeight = el.offsetHeight;
 
+	const HORIZONTAL_MARGIN = 1;
+
 	let rect: DOMRect;
 
 	if (props.anchorElement) {
@@ -36,9 +38,11 @@ export function calcPopupPosition(el: HTMLElement, props: {
 		left -= (el.offsetWidth / 2);
 
 		if (left + contentWidth - window.scrollX > window.innerWidth) {
-			left = window.innerWidth - contentWidth + window.scrollX - 1;
+			left = window.innerWidth - contentWidth + window.scrollX - HORIZONTAL_MARGIN;
 		}
 
+		left = Math.max(HORIZONTAL_MARGIN, left);
+
 		return [left, top];
 	};
 
@@ -57,9 +61,11 @@ export function calcPopupPosition(el: HTMLElement, props: {
 		left -= (el.offsetWidth / 2);
 
 		if (left + contentWidth - window.scrollX > window.innerWidth) {
-			left = window.innerWidth - contentWidth + window.scrollX - 1;
+			left = window.innerWidth - contentWidth + window.scrollX - HORIZONTAL_MARGIN;
 		}
 
+		left = Math.max(HORIZONTAL_MARGIN, left);
+
 		return [left, top];
 	};
 
@@ -75,6 +81,8 @@ export function calcPopupPosition(el: HTMLElement, props: {
 			top = props.y;
 		}
 
+		left = Math.max(HORIZONTAL_MARGIN, left);
+
 		top -= (el.offsetHeight / 2);
 
 		if (top + contentHeight - window.scrollY > window.innerHeight) {
@@ -106,6 +114,8 @@ export function calcPopupPosition(el: HTMLElement, props: {
 			top -= (el.offsetHeight / 2);
 		}
 
+		left = Math.max(HORIZONTAL_MARGIN, left);
+
 		if (top + contentHeight - window.scrollY > window.innerHeight) {
 			top = window.innerHeight - contentHeight + window.scrollY - 1;
 		}