diff --git a/device/arista/x86_64-arista_7280cr3_32p4/platform_env.conf b/device/arista/x86_64-arista_7280cr3_32p4/platform_env.conf
index 283e1c0ce..a6e93033f 100644
--- a/device/arista/x86_64-arista_7280cr3_32p4/platform_env.conf
+++ b/device/arista/x86_64-arista_7280cr3_32p4/platform_env.conf
@@ -1 +1,2 @@
+SYNCD_SHM_SIZE=1gb
 usemsi=1
diff --git a/device/arista/x86_64-arista_7800r3_48cq2_lc/platform_env.conf b/device/arista/x86_64-arista_7800r3_48cq2_lc/platform_env.conf
index 89102035f..76c93ccf1 100644
--- a/device/arista/x86_64-arista_7800r3_48cq2_lc/platform_env.conf
+++ b/device/arista/x86_64-arista_7800r3_48cq2_lc/platform_env.conf
@@ -1,2 +1,3 @@
+SYNCD_SHM_SIZE=1gb
 usemsi=1
 dmasize=512M
diff --git a/device/arista/x86_64-arista_7800r3_48cqm2_lc/platform_env.conf b/device/arista/x86_64-arista_7800r3_48cqm2_lc/platform_env.conf
index 89102035f..76c93ccf1 100644
--- a/device/arista/x86_64-arista_7800r3_48cqm2_lc/platform_env.conf
+++ b/device/arista/x86_64-arista_7800r3_48cqm2_lc/platform_env.conf
@@ -1,2 +1,3 @@
+SYNCD_SHM_SIZE=1gb
 usemsi=1
 dmasize=512M
diff --git a/device/arista/x86_64-arista_7800r3a_36d2_lc/platform_env.conf b/device/arista/x86_64-arista_7800r3a_36d2_lc/platform_env.conf
index 0f19ad3ca..9cce2f4dc 100644
--- a/device/arista/x86_64-arista_7800r3a_36d2_lc/platform_env.conf
+++ b/device/arista/x86_64-arista_7800r3a_36d2_lc/platform_env.conf
@@ -1,3 +1,4 @@
+SYNCD_SHM_SIZE=1gb
 usemsi=1
 dmasize=64M
 macsec_enabled=1