diff --git a/ftk/src/ftkmem.cpp b/ftk/src/ftkmem.cpp
index 1768d6c..5b16d3f 100644
--- a/ftk/src/ftkmem.cpp
+++ b/ftk/src/ftkmem.cpp
@@ -1498,6 +1498,8 @@ void f_memoryInit( void)
 		}
 	}
 }
+#elif defined( FLM_OSX)
+	#error OS X should provide support for RLIMIT_DATA
 #endif
 }