diff --git a/src/soc/intel/alderlake/include/soc/iomap.h b/src/soc/intel/alderlake/include/soc/iomap.h
index 59019d4cce..6188746555 100644
--- a/src/soc/intel/alderlake/include/soc/iomap.h
+++ b/src/soc/intel/alderlake/include/soc/iomap.h
@@ -20,8 +20,14 @@
 #define PCH_TRACE_HUB_BASE_SIZE	0x00800000
 #endif
 
+/* Hack to include SBREG in PCH_RESERVED region on ADL-S/RPL-S */
+#if CONFIG(SOC_INTEL_ALDERLAKE_PCH_S)
+#define PCH_PRESERVED_BASE_ADDRESS	0xe0000000
+#define PCH_PRESERVED_BASE_SIZE		0x1e800000
+#else
 #define PCH_PRESERVED_BASE_ADDRESS	0xfc800000
 #define PCH_PRESERVED_BASE_SIZE		0x02000000
+#endif
 
 #define UART_BASE_SIZE		0x1000