diff --git a/common/spdat.cpp b/common/spdat.cpp
index 1df6e55e5..01bf12efe 100644
--- a/common/spdat.cpp
+++ b/common/spdat.cpp
@@ -999,7 +999,7 @@ uint8 GetSpellLevel(uint16 spell_id, uint8 class_id)
 		return UINT8_MAX;
 	}
 
-	if (class_id >= Class::PLAYER_CLASS_COUNT) {
+	if (class_id < Class::Warrior || class_id > Class::PLAYER_CLASS_COUNT) {
 		return UINT8_MAX;
 	}