diff --git a/tools/platformio-build-esp32.py b/tools/platformio-build-esp32.py
index 9e220bbb8d7..e9790b6b4b2 100644
--- a/tools/platformio-build-esp32.py
+++ b/tools/platformio-build-esp32.py
@@ -102,7 +102,7 @@
         "-u", "newlib_include_syscalls_impl",
         "-u", "newlib_include_pthread_impl",
         "-u", "__cxa_guard_dummy",
-        "-Wl,-Map=" + join("$BUILD_DIR", basename(env.subst("${PROJECT_DIR}.map")))
+        '-Wl,-Map="%s"' % join("$BUILD_DIR", basename(env.subst("${PROJECT_DIR}.map")))
     ],
 
     CPPPATH=[
diff --git a/tools/platformio-build-esp32s2.py b/tools/platformio-build-esp32s2.py
index 5897608bf5d..6a09a44aded 100644
--- a/tools/platformio-build-esp32s2.py
+++ b/tools/platformio-build-esp32s2.py
@@ -96,7 +96,7 @@
         "-u", "newlib_include_syscalls_impl",
         "-u", "newlib_include_pthread_impl",
         "-u", "__cxa_guard_dummy",
-        "-Wl,-Map=" + join("$BUILD_DIR", basename(env.subst("${PROJECT_DIR}.map")))
+        '-Wl,-Map="%s"' % join("$BUILD_DIR", basename(env.subst("${PROJECT_DIR}.map")))
     ],
 
     CPPPATH=[