diff --git a/zephyr/Kconfig b/zephyr/Kconfig
index 1d02868fd5ca..cb925fc8e4db 100644
--- a/zephyr/Kconfig
+++ b/zephyr/Kconfig
@@ -93,7 +93,7 @@ config SOF_ZEPHYR_VIRTUAL_HEAP_SIZE
 config SOF_ZEPHYR_VIRTUAL_HEAP_REGION_SIZE
 	hex "Size in bytes of virtual memory region for virtual heap shared for all cores"
 	depends on MM_DRV_INTEL_ADSP_MTL_TLB
-	default 0x100000
+	default 0x140000
 	help
 	  This config defines size of virtual heap region shared between all cores
 
diff --git a/zephyr/lib/alloc.c b/zephyr/lib/alloc.c
index f95f66fbdb7f..f55460418a1b 100644
--- a/zephyr/lib/alloc.c
+++ b/zephyr/lib/alloc.c
@@ -344,6 +344,7 @@ static const struct vmh_heap_config static_hp_buffers = {
 		{ 2048, 8},
 		{ 4096, 11},
 		{ 8192, 10},
+		{ 32768, 8},
 		{ 65536, 3},
 		{ 131072, 1},
 		{ 524288, 1} /* buffer for kpb */