diff --git a/cocoa-foundation/src/foundation.rs b/cocoa-foundation/src/foundation.rs
index faad59e..ca19e20 100644
--- a/cocoa-foundation/src/foundation.rs
+++ b/cocoa-foundation/src/foundation.rs
@@ -242,7 +242,7 @@ impl NSProcessInfo for id {
         msg_send![self, processName]
     }
 
-    unsafe fn uptime(self) -> NSTimeInterval {
+    unsafe fn systemUptime(self) -> NSTimeInterval {
         msg_send![self, systemUptime]
     }