diff --git a/include/configs/ph1_ld4.h b/include/configs/ph1_ld4.h
index a546865..005a853 100644
--- a/include/configs/ph1_ld4.h
+++ b/include/configs/ph1_ld4.h
@@ -28,9 +28,7 @@
  *   SoC UART     : enable CONFIG_UNIPHIER_SERIAL
  *   On-board UART: enable CONFIG_SYS_NS16550_SERIAL
  */
-#if 1
-#define CONFIG_UNIPHIER_SERIAL
-#else
+#if 0
 #define CONFIG_SYS_NS16550_SERIAL
 #endif
 
diff --git a/include/configs/ph1_pro4.h b/include/configs/ph1_pro4.h
index 85c14ba..7dd6fd2 100644
--- a/include/configs/ph1_pro4.h
+++ b/include/configs/ph1_pro4.h
@@ -28,9 +28,7 @@
  *   SoC UART     : enable CONFIG_UNIPHIER_SERIAL
  *   On-board UART: enable CONFIG_SYS_NS16550_SERIAL
  */
-#if 1
-#define CONFIG_UNIPHIER_SERIAL
-#else
+#if 0
 #define CONFIG_SYS_NS16550_SERIAL
 #endif
 
diff --git a/include/configs/ph1_sld8.h b/include/configs/ph1_sld8.h
index 41e2299..1062aac 100644
--- a/include/configs/ph1_sld8.h
+++ b/include/configs/ph1_sld8.h
@@ -28,9 +28,7 @@
  *   SoC UART     : enable CONFIG_UNIPHIER_SERIAL
  *   On-board UART: enable CONFIG_SYS_NS16550_SERIAL
  */
-#if 1
-#define CONFIG_UNIPHIER_SERIAL
-#else
+#if 0
 #define CONFIG_SYS_NS16550_SERIAL
 #endif