diff --git a/platformio.ini b/platformio.ini
index 455e78998..9a9b4e7de 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -129,7 +129,7 @@ board_upload.flash_size = 4MB
 board_build.partitions = esp32_partition_4M.csv
 build_flags =
   ${common.build_flags}
-  -DEMSESP_DEFAULT_BOARD_PROFILE = "C3MINI"
+  '-DEMSESP_DEFAULT_BOARD_PROFILE="C3MINI"'
 
 ; lolin C3 mini v1 needs special wifi init.
 ; https://www.wemos.cc/en/latest/c3/c3_mini_1_0_0.html#about-wifi
@@ -141,7 +141,7 @@ board_build.partitions = esp32_partition_4M.csv
 build_flags =
   ${common.build_flags}
   -DBOARD_C3_MINI_V1
-  -DEMSESP_DEFAULT_BOARD_PROFILE = "C3MINI"
+  '-DEMSESP_DEFAULT_BOARD_PROFILE="C3MINI"'
 
 [env:lolin_s2_mini]
 extends = espressi32_base_tasmota
@@ -150,7 +150,7 @@ board_upload.flash_size = 4MB
 board_build.partitions = esp32_partition_4M.csv
 build_flags =
   ${common.build_flags}
-  -DEMSESP_DEFAULT_BOARD_PROFILE = "S2MINI"
+  '-DEMSESP_DEFAULT_BOARD_PROFILE="S2MINI"'
 
 [env:lolin_s3]
 extends = espressi32_base
@@ -163,7 +163,7 @@ board_upload.wait_for_upload_port = false
 build_flags =
   ${common.build_flags}
   -O2
-  -DEMSESP_DEFAULT_BOARD_PROFILE = "S32S3"
+  '-DEMSESP_DEFAULT_BOARD_PROFILE="S32S3"'
 
 ; to build and run: pio run -e standalone -t exec
 [env:standalone]