diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S
index 956d258c9d..ba312901f3 100644
--- a/arch/arm/lib/crt0.S
+++ b/arch/arm/lib/crt0.S
@@ -109,6 +109,10 @@ ENTRY(_main)
 	mov	r9, r0
 	bl	board_init_f_init_reserve
 
+#if defined(CONFIG_DEBUG_UART) && CONFIG_IS_ENABLED(SERIAL)
+	bl	debug_uart_init
+#endif
+
 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_EARLY_BSS)
 	CLEAR_BSS
 #endif
diff --git a/arch/arm/lib/crt0_64.S b/arch/arm/lib/crt0_64.S
index 680e674fa3..611affb74c 100644
--- a/arch/arm/lib/crt0_64.S
+++ b/arch/arm/lib/crt0_64.S
@@ -91,6 +91,10 @@ ENTRY(_main)
 	mov	x18, x0
 	bl	board_init_f_init_reserve
 
+#if defined(CONFIG_DEBUG_UART) && CONFIG_IS_ENABLED(SERIAL)
+	bl	debug_uart_init
+#endif
+
 	mov	x0, #0
 	bl	board_init_f