diff --git a/Marlin/src/gcode/parser.h b/Marlin/src/gcode/parser.h
index c2fe6880ed..401548b309 100644
--- a/Marlin/src/gcode/parser.h
+++ b/Marlin/src/gcode/parser.h
@@ -146,7 +146,7 @@ public:
       if (b) {
         if (param[ind]) {
           char * const ptr = command_ptr + param[ind];
-          value_ptr = valid_number(ptr) ? ptr : nullptr;
+          value_ptr = (valid_number(ptr) || TERN0(GCODE_QUOTED_STRINGS, *(ptr - 1) == '"')) ? ptr : nullptr;
         }
         else
           value_ptr = nullptr;