1 files changed, 3 insertions, 2 deletions
diff --git a/Source/Library/Common/String.class.cpp b/Source/Library/Common/String.class.cpp
index da2b93e..fe851bd 100644
--- a/Source/Library/Common/String.class.cpp
+++ b/Source/Library/Common/String.class.cpp
@@ -191,9 +191,10 @@ Vector<String> String::split(WChar c) const {
 	return ret;
 }
 
-String String::substr(s32int start, u32int size) {
+String String::substr(s32int start, s32int size) {
+	if (size == 0) return String();
 	if (start < 0) start = m_length - start;
-	if (size == 0) size = m_length - start;
+	if (size == -1) size = m_length - start;
 	String ret;
 	ret.m_string = new WChar[size + 1];
 	ret.m_length = size;