diff --git a/ext/standard/basic_functions.c b/ext/standard/basic_functions.c
index 2fd601bf429..dd3487e567b 100644
--- a/ext/standard/basic_functions.c
+++ b/ext/standard/basic_functions.c
@@ -303,12 +303,6 @@ function_entry basic_functions[] = {
 	PHP_FE(log,										NULL)
 	PHP_FE(log10,									NULL)
 	PHP_FE(sqrt,									NULL)
-	PHP_FE(exp2,									NULL)
-	PHP_FE(exp10,									NULL)
-	PHP_FE(log2,									NULL)
-#ifndef PHP_WIN32
-	PHP_FE(cbrt,									NULL)
-#endif
 	PHP_FE(hypot,									NULL)
 #ifndef PHP_WIN32
 	PHP_FE(expm1,									NULL)