diff --git a/kernel/trunk/core/apic.inc b/kernel/trunk/core/apic.inc
index 0f215b3afe..22fe54e1b9 100644
--- a/kernel/trunk/core/apic.inc
+++ b/kernel/trunk/core/apic.inc
@@ -484,3 +484,7 @@ get_clock_ns:
         mul     edx
         ret
 
+align 4
+acpi_get_root_ptr:
+        mov     eax, [acpi_rsdp]
+        ret
diff --git a/kernel/trunk/core/exports.inc b/kernel/trunk/core/exports.inc
index c348556298..3e33e307fb 100644
--- a/kernel/trunk/core/exports.inc
+++ b/kernel/trunk/core/exports.inc
@@ -129,6 +129,8 @@ __exports:
           net_buff_free,         'NetFree',            \
 \
           get_pcidev_list,       'GetPCIList',         \
+\
+          acpi_get_root_ptr,     'AcpiGetRootPtr',     \
 \
           0,                     'LFBAddress' ; must be the last one
 load kernel_exports_count dword from __exports + 24
diff --git a/kernel/trunk/init.inc b/kernel/trunk/init.inc
index 5ef7adde24..7ac92dfcc7 100644
--- a/kernel/trunk/init.inc
+++ b/kernel/trunk/init.inc
@@ -536,6 +536,7 @@ check_acpi:
         test    eax, eax
         jz      .done
 
+        mov     [acpi_rsdp-OS_BASE], eax
         mov     ecx, [eax+16]
         mov     edx, ACPI_FADT_SIGN
         mov     [acpi_rsdt_base-OS_BASE], ecx