diff --git a/.changes/fix-register-deep-link.md b/.changes/fix-register-deep-link.md
new file mode 100644
index 000000000..6245a4687
--- /dev/null
+++ b/.changes/fix-register-deep-link.md
@@ -0,0 +1,6 @@
+---
+"deep-link": patch
+"deep-link-js": patch
+---
+
+Fix runtime deep link registration failing on Linux when the app path has spaces.
diff --git a/plugins/deep-link/src/lib.rs b/plugins/deep-link/src/lib.rs
index 00757bf2a..55476bd78 100644
--- a/plugins/deep-link/src/lib.rs
+++ b/plugins/deep-link/src/lib.rs
@@ -293,7 +293,7 @@ mod imp {
                     .unwrap_or_else(|| bin.into_os_string())
                     .to_string_lossy()
                     .to_string();
-                let qualified_exec = format!("{} %u", exec);
+                let qualified_exec = format!("\"{}\" %u", exec);
 
                 let target = self.app.path().data_dir()?.join("applications");