diff --git a/include/services/ffa_svc.h b/include/services/ffa_svc.h
index 9a7c489..6841fd2 100644
--- a/include/services/ffa_svc.h
+++ b/include/services/ffa_svc.h
@@ -107,6 +107,7 @@
 #define FFA_VERSION		FFA_FID(SMC_32, FFA_FNUM_VERSION)
 #define FFA_FEATURES		FFA_FID(SMC_32, FFA_FNUM_FEATURES)
 #define FFA_RX_RELEASE		FFA_FID(SMC_32, FFA_FNUM_RX_RELEASE)
+#define FFA_RX_ACQUIRE		FFA_FID(SMC_32, FFA_FNUM_RX_ACQUIRE)
 #define FFA_RXTX_MAP_SMC32	FFA_FID(SMC_32, FFA_FNUM_RXTX_MAP)
 #define FFA_RXTX_UNMAP		FFA_FID(SMC_32, FFA_FNUM_RXTX_UNMAP)
 #define FFA_PARTITION_INFO_GET	FFA_FID(SMC_32, FFA_FNUM_PARTITION_INFO_GET)