diff --git a/third_party/silabs/SiWx917_sdk.gni b/third_party/silabs/SiWx917_sdk.gni
index 6873cc267e..3d22486601 100644
--- a/third_party/silabs/SiWx917_sdk.gni
+++ b/third_party/silabs/SiWx917_sdk.gni
@@ -251,7 +251,6 @@ template("siwx917_sdk") {
       "UDMA_ROMDRIVER_PRESENT=1",
       "PLL_ROMDRIVER_PRESENT=1",
       "SL_MATTER_GN_BUILD=1",
-      "SILABS_LOG_OUT_UART=${sl_uart_log_output}",
     ]
 
     if (silabs_log_enabled && chip_logging) {
@@ -334,6 +333,12 @@ template("siwx917_sdk") {
       ]
     }
 
+    if (sl_uart_log_output) {
+      defines += [ "SILABS_LOG_OUT_UART=1" ]
+    } else {
+      defines += [ "SILABS_LOG_OUT_UART=0" ]
+    }
+
     if (chip_build_libshell) {  # matter shell
       defines += [ "ENABLE_CHIP_SHELL" ]
     }
diff --git a/third_party/silabs/efr32_sdk.gni b/third_party/silabs/efr32_sdk.gni
index 943a0e3763..a477809326 100644
--- a/third_party/silabs/efr32_sdk.gni
+++ b/third_party/silabs/efr32_sdk.gni
@@ -481,7 +481,6 @@ template("efr32_sdk") {
       "SL_OPENTHREAD_STACK_FEATURES_CONFIG_FILE=\"sl_openthread_features_config.h\"",
       "SL_CSL_TIMEOUT=${sl_ot_csl_timeout_sec}",
       "CIRCULAR_QUEUE_USE_LOCAL_CONFIG_HEADER=1",
-      "SILABS_LOG_OUT_UART=${sl_uart_log_output}",
     ]
 
     if (silabs_log_enabled && chip_logging) {
@@ -490,6 +489,12 @@ template("efr32_sdk") {
       defines += [ "SILABS_LOG_ENABLED=0" ]
     }
 
+    if (sl_uart_log_output) {
+      defines += [ "SILABS_LOG_OUT_UART=1" ]
+    } else {
+      defines += [ "SILABS_LOG_OUT_UART=0" ]
+    }
+
     if (use_silabs_thread_lib) {
       defines += [ "SL_CONFIG_OPENTHREAD_LIB=1" ]
     } else {