diff --git a/Source/GSServicesManager.m b/Source/GSServicesManager.m
index 7d4cbdc66..06ad38edc 100644
--- a/Source/GSServicesManager.m
+++ b/Source/GSServicesManager.m
@@ -247,7 +247,7 @@ NSRegisterServicesProvider(id provider, NSString *name)
   if (aSelector == 0)
     [NSException raise: NSInvalidArgumentException
                 format: @"%@ null selector given", NSStringFromSelector(_cmd)];
-  return get_imp(GSObjCClass(self), aSelector);
+  return class_getMethodImplementation(GSObjCClass(self), aSelector);
 }
 
 + (id) servicesProvider