diff --git a/ext/standard/basic_functions.c b/ext/standard/basic_functions.c
index d0ca3da550e..2dcf8f2568f 100644
--- a/ext/standard/basic_functions.c
+++ b/ext/standard/basic_functions.c
@@ -2286,6 +2286,7 @@ PHP_FUNCTION(extract)
 			if (getParameters(ht, 3, &var_array, &etype, &prefix) == FAILURE) {
 				WRONG_PARAM_COUNT;
 			}
+			convert_to_long(etype);
 			extype = etype->value.lval;
 			break;