diff --git a/include/osi_core.h b/include/osi_core.h
index 84f8e49..d2d920d 100644
--- a/include/osi_core.h
+++ b/include/osi_core.h
@@ -272,6 +272,7 @@ typedef my_lint_64		nvel64_t;
  */
 #define OSI_PTP_SSINC_16	16U
 #define OSI_PTP_SSINC_4		4U
+#define OSI_PTP_SSINC_6		6U
 /** @} */
 
 /**
diff --git a/osi/core/eqos_core.c b/osi/core/eqos_core.c
index e4f3ea3..3d8cb48 100644
--- a/osi/core/eqos_core.c
+++ b/osi/core/eqos_core.c
@@ -4304,6 +4304,8 @@ static void eqos_config_ssir(struct osi_core_priv_data *const osi_core,
 	if ((mac_tcr & EQOS_MAC_TCR_TSCFUPDT) == EQOS_MAC_TCR_TSCFUPDT) {
 		if (osi_core->mac_ver <= OSI_EQOS_MAC_4_10) {
 			val = OSI_PTP_SSINC_16;
+		} else if (osi_core->mac_ver == OSI_EQOS_MAC_5_30) {
+			val = OSI_PTP_SSINC_6;
 		} else {
 			val = OSI_PTP_SSINC_4;
 		}
diff --git a/osi/core/osi_hal.c b/osi/core/osi_hal.c
index 351adbd..ce52259 100644
--- a/osi/core/osi_hal.c
+++ b/osi/core/osi_hal.c
@@ -837,6 +837,9 @@ nve32_t osi_ptp_configuration(struct osi_core_priv_data *const osi_core,
 			ssinc = OSI_PTP_SSINC_16;
 		} else {
 			ssinc = OSI_PTP_SSINC_4;
+			if (osi_core->mac_ver == OSI_EQOS_MAC_5_30) {
+				ssinc = OSI_PTP_SSINC_6;
+			}
 		}
 
 		temp = ((nveu64_t)1000 << 32);