diff --git a/src/config.c b/src/config.c
index 2b9026989..1b1ce3a23 100644
--- a/src/config.c
+++ b/src/config.c
@@ -2096,7 +2096,7 @@ config_set_int(char *head, char *name, int val)
 	ent = create_entry(section, name);
 
     sprintf(ent->data, "%i", val);
-    mbstowcs(ent->wdata, ent->data, sizeof_w(ent->wdata));
+    mbstowcs(ent->wdata, ent->data, sizeof(ent->wdata));
 }
 
 
@@ -2115,7 +2115,7 @@ config_set_hex16(char *head, char *name, int val)
 	ent = create_entry(section, name);
 
     sprintf(ent->data, "%04X", val);
-    mbstowcs(ent->wdata, ent->data, sizeof_w(ent->wdata));
+    mbstowcs(ent->wdata, ent->data, sizeof(ent->wdata));
 }
 
 
@@ -2173,7 +2173,7 @@ config_set_string(char *head, char *name, char *val)
 	ent = create_entry(section, name);
 
     memcpy(ent->data, val, sizeof(ent->data));
-    mbstowcs(ent->wdata, ent->data, sizeof_w(ent->wdata));
+    mbstowcs(ent->wdata, ent->data, sizeof(ent->wdata));
 }