diff --git a/Zend/zend.c b/Zend/zend.c
index 0fd54c8fec0..de7d52b0e30 100644
--- a/Zend/zend.c
+++ b/Zend/zend.c
@@ -769,7 +769,7 @@ int zend_startup(zend_utility_functions *utility_functions, char **extensions) /
 	zend_compile_file = compile_file;
 	zend_execute_ex = execute_ex;
 	zend_execute_internal = NULL;
-#endif /* HAVE_SYS_SDT_H */
+#endif /* HAVE_DTRACE */
 	zend_compile_string = compile_string;
 	zend_throw_exception_hook = NULL;