diff --git a/build.zig b/build.zig
index 3ba8b6b64..414b66804 100644
--- a/build.zig
+++ b/build.zig
@@ -669,7 +669,12 @@ pub fn build(b: *std.Build) !void {
         b.installFile("images/icons/icon_128.png", "share/icons/hicolor/128x128/apps/com.mitchellh.ghostty.png");
         b.installFile("images/icons/icon_256.png", "share/icons/hicolor/256x256/apps/com.mitchellh.ghostty.png");
         b.installFile("images/icons/icon_512.png", "share/icons/hicolor/512x512/apps/com.mitchellh.ghostty.png");
-        b.installFile("images/icons/icon_1024.png", "share/icons/hicolor/1024x1024/apps/com.mitchellh.ghostty.png");
+
+        // Flatpaks only support icons up to 512x512.
+        if (!config.flatpak) {
+            b.installFile("images/icons/icon_1024.png", "share/icons/hicolor/1024x1024/apps/com.mitchellh.ghostty.png");
+        }
+
         b.installFile("images/icons/icon_16@2x.png", "share/icons/hicolor/16x16@2/apps/com.mitchellh.ghostty.png");
         b.installFile("images/icons/icon_32@2x.png", "share/icons/hicolor/32x32@2/apps/com.mitchellh.ghostty.png");
         b.installFile("images/icons/icon_128@2x.png", "share/icons/hicolor/128x128@2/apps/com.mitchellh.ghostty.png");