diff --git a/src/runtime-rs/Makefile b/src/runtime-rs/Makefile
index 3fc3901e1b..06103856cd 100644
--- a/src/runtime-rs/Makefile
+++ b/src/runtime-rs/Makefile
@@ -177,6 +177,8 @@ DEFOVERHEADMEMSZ_DB := 32
 DEFOVERHEADVCPUS_TEE := 0.4
 ##VAR DEFOVERHEADMEMSZ_TEE=<number> Memory overhead (MiB) for SNP/TDX runtimes
 DEFOVERHEADMEMSZ_TEE := 128
+##VAR DEFOVERHEADMEMSZ_TEE_SE=<number> Memory overhead (MiB) for IBM SE runtimes (includes 512 MiB swiotlb bounce buffer)
+DEFOVERHEADMEMSZ_TEE_SE := 768
 ##VAR DEFMEMSLOTS=<number> Default memory slots
 # Cases to consider :
 # - nvdimm rootfs image
@@ -697,6 +699,7 @@ USER_VARS += DEFOVERHEADVCPUS_TEE
 USER_VARS += DEFOVERHEADVCPUS_DB
 USER_VARS += DEFOVERHEADMEMSZ_DB
 USER_VARS += DEFOVERHEADMEMSZ_TEE
+USER_VARS += DEFOVERHEADMEMSZ_TEE_SE
 USER_VARS += DEFMAXVCPUS
 USER_VARS += DEFMAXVCPUS_DB
 USER_VARS += DEFMAXVCPUS_QEMU
diff --git a/src/runtime-rs/config/configuration-qemu-se-runtime-rs.toml.in b/src/runtime-rs/config/configuration-qemu-se-runtime-rs.toml.in
index b04046a0f7..4596116bc8 100644
--- a/src/runtime-rs/config/configuration-qemu-se-runtime-rs.toml.in
+++ b/src/runtime-rs/config/configuration-qemu-se-runtime-rs.toml.in
@@ -143,7 +143,7 @@ default_memory = @DEFMEMSZ@
 # missing, requested_memory is treated as 0, so vm_memory equals overhead_memory.
 # When no workload limits are present, default_memory is used instead.
 # See docs/how-to/how-to-size-sandbox-overhead-runtime-rs.md
-overhead_memory = @DEFOVERHEADMEMSZ_TEE@
+overhead_memory = @DEFOVERHEADMEMSZ_TEE_SE@
 #
 # Default memory slots per SB/VM.
 # If unspecified then it will be set @DEFMEMSLOTS@.