diff --git a/Flash.cpp b/Flash.cpp
index 195de5b..f1a9181 100644
--- a/Flash.cpp
+++ b/Flash.cpp
@@ -32,3 +32,23 @@ void _FLASH_STRING::print(Print &stream) const
     stream.print(c); // print in char form
   }
 }
+
+unsigned int _FLASH_STRING::strncmp(const char *s2, size_t n) {
+  size_t i;
+	size_t s2_len = strlen(s2);
+
+	if (s2_len < n) {
+		// s2 too short
+		return 1;
+	}
+	
+	for (i = 0; i < n; i++) {
+	  char c = (*this)[i];
+		if (0 == c || c != s2[i]) {
+			return 1;
+		}
+	}
+	
+	return 0;
+
+}
diff --git a/Flash.h b/Flash.h
index 1f9aa5e..a1e697d 100644
--- a/Flash.h
+++ b/Flash.h
@@ -88,7 +88,9 @@ class _FLASH_STRING : public _Printable
   { return static_cast<char>(pgm_read_byte(_arr + index)); }
 
   void print(Print &stream) const;
-
+  
+  unsigned int strncmp(const char *s2, size_t n);
+  
 private:
   const prog_char *_arr;
 };
@@ -230,4 +232,4 @@ inline Print &operator <<(Print &stream, const _FLASH_TABLE<T> &printable)
 inline Print &operator <<(Print &stream, const _FLASH_STRING_ARRAY &printable) 
 { printable.print(stream); return stream; }
 
-#endif // def __FLASH_H__
\ No newline at end of file
+#endif // def __FLASH_H__