diff --git a/locales/index.d.ts b/locales/index.d.ts
index bcb78e4ee1..8276ead05e 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -10805,6 +10805,10 @@ export interface Locale extends ILocale {
      * Date
      */
     "date": string;
+    /**
+     * Boost (hold Shift for visibility menu)
+     */
+    "renoteShift": string;
     /**
      * Quoted.
      */
diff --git a/packages/frontend/src/components/MkNote.vue b/packages/frontend/src/components/MkNote.vue
index 98ec61cefd..b4193369ef 100644
--- a/packages/frontend/src/components/MkNote.vue
+++ b/packages/frontend/src/components/MkNote.vue
@@ -128,6 +128,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<button
 					v-if="canRenote"
 					ref="renoteButton"
+					v-tooltip="renoted ? i18n.ts.unrenote : (!defaultStore.state.showVisibilitySelectorOnBoost ? i18n.ts.renoteShift : i18n.ts.renote)"
 					:class="$style.footerButton"
 					class="_button"
 					:style="renoted ? 'color: var(--MI_THEME-accent) !important;' : ''"
diff --git a/packages/frontend/src/components/MkNoteDetailed.vue b/packages/frontend/src/components/MkNoteDetailed.vue
index a5e82782b0..21d8568300 100644
--- a/packages/frontend/src/components/MkNoteDetailed.vue
+++ b/packages/frontend/src/components/MkNoteDetailed.vue
@@ -140,6 +140,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<button
 				v-if="canRenote"
 				ref="renoteButton"
+				v-tooltip="renoted ? i18n.ts.unrenote : (!defaultStore.state.showVisibilitySelectorOnBoost ? i18n.ts.renoteShift : i18n.ts.renote)"
 				class="_button"
 				:class="$style.noteFooterButton"
 				:style="renoted ? 'color: var(--MI_THEME-accent) !important;' : ''"
diff --git a/packages/frontend/src/components/MkNoteSub.vue b/packages/frontend/src/components/MkNoteSub.vue
index f9e54f70aa..c84d80475f 100644
--- a/packages/frontend/src/components/MkNoteSub.vue
+++ b/packages/frontend/src/components/MkNoteSub.vue
@@ -28,6 +28,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<button
 					v-if="canRenote"
 					ref="renoteButton"
+					v-tooltip="renoted ? i18n.ts.unrenote : (!defaultStore.state.showVisibilitySelectorOnBoost ? i18n.ts.renoteShift : i18n.ts.renote)"
 					class="_button"
 					:class="$style.noteFooterButton"
 					:style="renoted ? 'color: var(--MI_THEME-accent) !important;' : ''"
diff --git a/packages/frontend/src/components/SkNote.vue b/packages/frontend/src/components/SkNote.vue
index c6754764b2..a4265896af 100644
--- a/packages/frontend/src/components/SkNote.vue
+++ b/packages/frontend/src/components/SkNote.vue
@@ -129,6 +129,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<button
 					v-if="canRenote"
 					ref="renoteButton"
+					v-tooltip="renoted ? i18n.ts.unrenote : (!defaultStore.state.showVisibilitySelectorOnBoost ? i18n.ts.renoteShift : i18n.ts.renote)"
 					:class="$style.footerButton"
 					class="_button"
 					:style="renoted ? 'color: var(--MI_THEME-accent) !important;' : ''"
diff --git a/packages/frontend/src/components/SkNoteDetailed.vue b/packages/frontend/src/components/SkNoteDetailed.vue
index 5017e3d902..a66e17a134 100644
--- a/packages/frontend/src/components/SkNoteDetailed.vue
+++ b/packages/frontend/src/components/SkNoteDetailed.vue
@@ -145,6 +145,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<button
 				v-if="canRenote"
 				ref="renoteButton"
+				v-tooltip="renoted ? i18n.ts.unrenote : (!defaultStore.state.showVisibilitySelectorOnBoost ? i18n.ts.renoteShift : i18n.ts.renote)"
 				class="_button"
 				:class="$style.noteFooterButton"
 				:style="renoted ? 'color: var(--MI_THEME-accent) !important;' : ''"
diff --git a/packages/frontend/src/components/SkNoteSub.vue b/packages/frontend/src/components/SkNoteSub.vue
index 9205983850..39cbaa3195 100644
--- a/packages/frontend/src/components/SkNoteSub.vue
+++ b/packages/frontend/src/components/SkNoteSub.vue
@@ -36,6 +36,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<button
 					v-if="canRenote"
 					ref="renoteButton"
+					v-tooltip="renoted ? i18n.ts.unrenote : (!defaultStore.state.showVisibilitySelectorOnBoost ? i18n.ts.renoteShift : i18n.ts.renote)"
 					class="_button"
 					:class="$style.noteFooterButton"
 					:style="renoted ? 'color: var(--MI_THEME-accent) !important;' : ''"
diff --git a/sharkey-locales/en-US.yml b/sharkey-locales/en-US.yml
index db3ef9c3eb..e2a57f3613 100644
--- a/sharkey-locales/en-US.yml
+++ b/sharkey-locales/en-US.yml
@@ -17,6 +17,7 @@ emailDestination: "Destination address"
 date: "Date"
 renote: "Boost"
 unrenote: "Remove boost"
+renoteShift: "Boost (hold Shift for visibility menu)"
 renoted: "Boosted."
 quoted: "Quoted."
 rmboost: "Unboosted."