diff --git a/buildroot/share/PlatformIO/scripts/signature.py b/buildroot/share/PlatformIO/scripts/signature.py
index ea878d9a67..4fc0084e57 100644
--- a/buildroot/share/PlatformIO/scripts/signature.py
+++ b/buildroot/share/PlatformIO/scripts/signature.py
@@ -260,7 +260,7 @@ def compute_build_signature(env):
     # Generate a C source file for storing this array
     with open('Marlin/src/mczip.h','wb') as result_file:
         result_file.write(
-                b'#ifndef NO_CONFIGURATION_EMBEDDING_WARNING\n'
+              b'#ifndef NO_CONFIGURATION_EMBEDDING_WARNING\n'
             + b'  #warning "Generated file \'mc.zip\' is embedded (Define NO_CONFIGURATION_EMBEDDING_WARNING to suppress this warning.)"\n'
             + b'#endif\n'
             + b'const unsigned char mc_zip[] PROGMEM = {\n '