diff --git a/src/main/java/ch/njol/skript/classes/data/DefaultOperations.java b/src/main/java/ch/njol/skript/classes/data/DefaultOperations.java
index dd8df4e36c3..42352119084 100644
--- a/src/main/java/ch/njol/skript/classes/data/DefaultOperations.java
+++ b/src/main/java/ch/njol/skript/classes/data/DefaultOperations.java
@@ -129,6 +129,7 @@ public class DefaultOperations {
 		Arithmetics.registerDifference(Date.class, Timespan.class, Date::difference);
 
 		// String - String
+		Arithmetics.registerDefaultValue(String.class, () -> "");
 		Arithmetics.registerOperation(Operator.ADDITION, String.class, String.class, String::concat);
 
 	}
diff --git a/src/test/skript/tests/regressions/7164-expressions sometimes dont convert.sk b/src/test/skript/tests/regressions/7164-expressions sometimes dont convert.sk
index f7954b3a642..01bc7edb773 100644
--- a/src/test/skript/tests/regressions/7164-expressions sometimes dont convert.sk	
+++ b/src/test/skript/tests/regressions/7164-expressions sometimes dont convert.sk	
@@ -2,7 +2,7 @@ test "expressions sometimes dont convert":
 	assert formatted ({_foo} + {_bar}) is not set with "formatting nothing shouldn't throw an error"
 
 	set {_foo} to "test"
-	assert formatted ({_foo} + {_bar}) is not set with "formatting string + none shouldn't throw an error"
+	assert formatted ({_foo} + {_bar}) is "test" with "formatting string + none shouldn't throw an error"
 
 	set {_foo} to 1
 	set {_bar} to 2