diff --git a/components/esm/defs.hpp b/components/esm/defs.hpp
index 82e798620..9a4cefa37 100644
--- a/components/esm/defs.hpp
+++ b/components/esm/defs.hpp
@@ -68,7 +68,7 @@ struct ENAMstruct
 
   // Which skills/attributes are affected (for restore/drain spells
   // etc.)
-  char skill, attribute; // -1 if N/A
+  signed char skill, attribute; // -1 if N/A
 
   // Other spell parameters
   int range; // 0 - self, 1 - touch, 2 - target (RangeType enum)
@@ -84,7 +84,7 @@ struct EffectList
 
   void load(ESMReader &esm)
   {
-    ENAMstruct s;    
+    ENAMstruct s;
     while(esm.isNextSub("ENAM"))
       {
         esm.getHT(s, 24);