diff --git a/src/plugins/download/DownloadButton.tsx b/src/plugins/download/DownloadButton.tsx
index c26e6ae..701508a 100644
--- a/src/plugins/download/DownloadButton.tsx
+++ b/src/plugins/download/DownloadButton.tsx
@@ -27,7 +27,7 @@ export function DownloadButton() {
         undefined;
 
     // slides must be explicitly marked as downloadable when custom download function is provided
-    const canDownload = customDownload ? Boolean(currentSlide?.download) : Boolean(downloadUrl);
+    const canDownload = customDownload ? currentSlide?.download !== false : Boolean(downloadUrl);
 
     const defaultDownload = () => {
         if (currentSlide && downloadUrl) {
diff --git a/src/plugins/share/ShareButton.tsx b/src/plugins/share/ShareButton.tsx
index 558966b..7a83178 100644
--- a/src/plugins/share/ShareButton.tsx
+++ b/src/plugins/share/ShareButton.tsx
@@ -28,7 +28,7 @@ export function ShareButton() {
         undefined;
 
     // slides must be explicitly marked as shareable when custom share function is provided
-    const canShare = customShare ? Boolean(currentSlide?.share) : share && navigator.canShare(share);
+    const canShare = customShare ? currentSlide?.share !== false : share && navigator.canShare(share);
 
     const defaultShare = () => {
         if (share) {