diff --git a/README.md b/README.md
index f8575e3a6..f2176a544 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,9 @@ _(after installation, the item is labeled as `"INSTALLED"` and can then be used
    c. modify platform.txt to enable float printf support:  
 add "-Wl,-u,vfprintf -lprintf_flt -lm" to "compiler.c.elf.flags=" before existing flag "-Wl,--gc-sections"  
 example:  
-`"compiler.c.elf.flags=-w -Os -Wl,-u,vfprintf -lprintf_flt -lm -Wl,--gc-sections"`
+`"compiler.c.elf.flags=-w -Os -Wl,-u,vfprintf -lprintf_flt -lm -Wl,--gc-sections"`  
+For Windows users, the file can be found at:  
+"C:\Users\(user)\AppData\Local\Arduino15\packages\arduino\hardware\avr\(version)"
 
 #### 2. Source code compilation