diff --git a/src/kits/support/String.cpp b/src/kits/support/String.cpp
index e29e082464..56b6084e93 100644
--- a/src/kits/support/String.cpp
+++ b/src/kits/support/String.cpp
@@ -546,7 +546,7 @@ BString::Split(const char* separator, bool noEmptyStrings,
 		if (endIndex > index || !noEmptyStrings) {
 			BString toAppend(String() + index, endIndex - index);
 			if (toAppend.Length() != endIndex - index
-				|| _list.Add(toAppend)) {
+				|| !_list.Add(toAppend)) {
 				return false;
 			}
 		}