diff --git a/src/deh_mapping.h b/src/deh_mapping.h
index 8d89ef8a..e71468c4 100644
--- a/src/deh_mapping.h
+++ b/src/deh_mapping.h
@@ -60,7 +60,7 @@ struct deh_mapping_entry_s
 {
     // field name
    
-    char *name;
+    const char *name;
 
     // location relative to the base in the deh_mapping_t struct
     // If this is NULL, it is an unsupported mapping