diff --git a/Cart_Reader/GB.ino b/Cart_Reader/GB.ino
index c459a0e..b9529e5 100644
--- a/Cart_Reader/GB.ino
+++ b/Cart_Reader/GB.ino
@@ -558,10 +558,10 @@ void showCartInfo_GB() {
     print_Msg(FS(FSTRING_NAME));
     println_Msg(romName);
     if (cartID[0] != 0) {
-      print_Msg(F("Serial: "));
+      print_Msg(FS(FSTRING_SERIAL));
       println_Msg(cartID);
     }
-    print_Msg(F("Revision: "));
+    print_Msg(FS(FSTRING_REVISION));
     println_Msg(romVersion);
 
     print_Msg(FS(FSTRING_MAPPER));
diff --git a/Cart_Reader/GBA.ino b/Cart_Reader/GBA.ino
index 37538ff..26e9f22 100644
--- a/Cart_Reader/GBA.ino
+++ b/Cart_Reader/GBA.ino
@@ -254,9 +254,9 @@ void setup_GBA() {
   // Print start page
   print_Msg(FS(FSTRING_NAME));
   println_Msg(romName);
-  print_Msg(F("Serial: "));
+  print_Msg(FS(FSTRING_SERIAL));
   println_Msg(cartID);
-  print_Msg(F("Revision: "));
+  print_Msg(FS(FSTRING_REVISION));
   println_Msg(romVersion);
   print_Msg(FS(FSTRING_ROM_SIZE));
   if (cartSize == 0)
@@ -681,7 +681,7 @@ void getCartInfo_GBA() {
 
             // Print current database entry
             println_Msg(gamename);
-            print_Msg(F("Serial: "));
+            print_Msg(FS(FSTRING_SERIAL));
             println_Msg(tempStr);
             print_Msg(FS(FSTRING_ROM_SIZE));
             print_Msg(cartSize);
diff --git a/Cart_Reader/N64.ino b/Cart_Reader/N64.ino
index 46a5a2a..bd0be51 100644
--- a/Cart_Reader/N64.ino
+++ b/Cart_Reader/N64.ino
@@ -1925,9 +1925,9 @@ void printCartInfo_N64() {
     display_Clear();
     print_Msg(FS(FSTRING_NAME));
     println_Msg(romName);
-    print_Msg(F("Serial: "));
+    print_Msg(FS(FSTRING_SERIAL));
     println_Msg(cartID);
-    print_Msg(F("Revision: "));
+    print_Msg(FS(FSTRING_REVISION));
     println_Msg(romVersion);
     print_Msg(FS(FSTRING_ROM_SIZE));
     print_Msg(cartSize);
@@ -1969,7 +1969,7 @@ void printCartInfo_N64() {
     println_Msg("");
     print_Msg(FS(FSTRING_NAME));
     println_Msg(romName);
-    print_Msg(F("Serial: "));
+    print_Msg(FS(FSTRING_SERIAL));
     println_Msg(cartID);
     print_Msg(F("CRC1: "));
     println_Msg(checksumStr);
diff --git a/Cart_Reader/OSCR.cpp b/Cart_Reader/OSCR.cpp
index 918e623..8bfc882 100644
--- a/Cart_Reader/OSCR.cpp
+++ b/Cart_Reader/OSCR.cpp
@@ -77,7 +77,9 @@ constexpr char PROGMEM FSTRING_MAPPER[] = "Mapper: ";
 constexpr char PROGMEM FSTRING_SIZE[] = "Size: ";
 constexpr char PROGMEM FSTRING_NAME[] = "Name: ";
 constexpr char PROGMEM FSTRING_CHECKSUM[] = "Checksum: ";
-constexpr char PROGMEM FSTRING_ROM_SIZE[] ="ROM Size: ";
+constexpr char PROGMEM FSTRING_ROM_SIZE[] = "ROM Size: ";
+constexpr char PROGMEM FSTRING_REVISION[] = "Revision: ";
+constexpr char PROGMEM FSTRING_SERIAL[] = "Serial: ";
 
 /*==== /CONSTANTS =================================================*/
 
diff --git a/Cart_Reader/OSCR.h b/Cart_Reader/OSCR.h
index 6381d86..f8960a7 100644
--- a/Cart_Reader/OSCR.h
+++ b/Cart_Reader/OSCR.h
@@ -102,6 +102,8 @@ extern const char PROGMEM FSTRING_SIZE[];
 extern const char PROGMEM FSTRING_ROM_SIZE[];
 extern const char PROGMEM FSTRING_NAME[];
 extern const char PROGMEM FSTRING_CHECKSUM[];
+extern const char PROGMEM FSTRING_REVISION[];
+extern const char PROGMEM FSTRING_SERIAL[];
 
 #define FS(pmem_string) (reinterpret_cast<const __FlashStringHelper *>(pmem_string))
 
diff --git a/Cart_Reader/SNES.ino b/Cart_Reader/SNES.ino
index b0b0e0b..d8e83c5 100644
--- a/Cart_Reader/SNES.ino
+++ b/Cart_Reader/SNES.ino
@@ -858,7 +858,7 @@ void getCartInfo_SNES() {
   print_Msg(FS(FSTRING_NAME));
   println_Msg(romName);
 
-  print_Msg(F("Revision: "));
+  print_Msg(FS(FSTRING_REVISION));
   println_Msg(romVersion);
 
   print_Msg(F("Type: "));