diff --git a/Marlin/gcode.h b/Marlin/gcode.h
index ac3268d7d..aa51a57b0 100644
--- a/Marlin/gcode.h
+++ b/Marlin/gcode.h
@@ -144,10 +144,6 @@ public:
 
     #define SEEN_TEST(L) TEST(codebits[LETTER_IND(L)], LETTER_BIT(L))
 
-    // Seen any axis parameter
-    // Optimized by moving 'X' up to index 24
-    FORCE_INLINE bool seen_axis() { return codebits[3] || SEEN_TEST('E'); }
-
   #else // !FASTER_GCODE_PARSER
 
     // Code is found in the string. If not found, value_ptr is unchanged.
@@ -164,13 +160,13 @@ public:
 
     #define SEEN_TEST(L) !!strchr(command_args, L)
 
-    // Seen any axis parameter
-    static bool seen_axis() {
-      return SEEN_TEST('X') || SEEN_TEST('Y') || SEEN_TEST('Z') || SEEN_TEST('E');
-    }
-
   #endif // !FASTER_GCODE_PARSER
 
+  // Seen any axis parameter
+  static bool seen_axis() {
+    return SEEN_TEST('X') || SEEN_TEST('Y') || SEEN_TEST('Z') || SEEN_TEST('E');
+  }
+
   // Populate all fields by parsing a single line of GCode
   // This uses 54 bytes of SRAM to speed up seen/value
   static void parse(char * p);