diff --git a/src/config.c b/src/config.c
index 252dd9b..d7e1ee3 100644
--- a/src/config.c
+++ b/src/config.c
@@ -26,6 +26,7 @@
 bool islogob = true;
 bool islogos = false;
 bool islogod = true;
+bool islogocustom = false;
 bool isos = true;
 bool ishost = true;
 #if defined(__linux__) || defined(__sunos)
@@ -187,13 +188,21 @@ void getconf() {
 
     // デフォルトは大きいロゴ
     if (strstr(line, "show logo") != NULL) {
+      puts("show logo");
       if (containvocab(line, "small")) {
+        puts("small");
         islogob = false;
         islogos = true;
       } else {
+        puts("big");
         islogob = true;
         islogos = false;
       }
+
+      if (containvocab(line, "custom")) {
+        puts("custom");
+        islogocustom = true;
+      }
     }
 
     // カスタムロゴ
@@ -204,9 +213,8 @@ void getconf() {
       mksmalllogo = true;
     }
 
-    if (mkbiglogo) {
+    if (mkbiglogo && islogocustom && islogob) {
       isbiglogo = true;
-      islogob = true;
       if (strstr(line, "define custom big logo:") != NULL) {
         continue;
       } else if (strstr(line, "EOL") != NULL) {
@@ -230,9 +238,8 @@ void getconf() {
       }
     }
 
-    if (mksmalllogo) {
+    if (mksmalllogo && islogocustom && islogos) {
       issmalllogo = true;
-      islogos = true;
       if (strstr(line, "define custom small logo:") != NULL) {
         continue;
       } else if (strstr(line, "EOL") != NULL) {
diff --git a/src/config.h b/src/config.h
index f266edf..1afda6c 100644
--- a/src/config.h
+++ b/src/config.h
@@ -7,6 +7,7 @@
 extern bool islogob;
 extern bool islogos;
 extern bool islogod;
+extern bool islogocustom;
 extern bool isos;
 extern bool ishost;
 #if defined(__linux__) || defined(__sunos)