diff --git a/Cargo.toml b/Cargo.toml
index 343c51336b..8ec910a84f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -51,7 +51,6 @@ default = [
   "serial_debug",
   "self_modifying",
   "x86_kvm_pv",
-  "syscall_debug",
 ]
 
 # Activates some limited code-overwriting optimizations, based on CPU features.