diff --git a/recipes-bsp/ti-sci-fw/ti-sci-fw_git.bb b/recipes-bsp/ti-sci-fw/ti-sci-fw_git.bb
index e5dcdd61..79c39ee5 100644
--- a/recipes-bsp/ti-sci-fw/ti-sci-fw_git.bb
+++ b/recipes-bsp/ti-sci-fw/ti-sci-fw_git.bb
@@ -36,6 +36,7 @@ SYSFW_PREFIX_j7200-hs-evm-k3r5 = "fs"
 SYSFW_PREFIX_j721s2-evm-k3r5 = "fs"
 SYSFW_PREFIX_j721s2-hs-evm-k3r5 = "fs"
 SYSFW_PREFIX_j784s4-evm-k3r5 = "fs"
+SYSFW_PREFIX_j784s4-hs-evm-k3r5 = "fs"
 SYSFW_PREFIX_am62xx-evm-k3r5 = "fs"
 SYSFW_PREFIX_am62xx-lp-evm-k3r5 = "fs"
 
diff --git a/recipes-bsp/trusted-firmware-a/trusted-firmware-a_%.bbappend b/recipes-bsp/trusted-firmware-a/trusted-firmware-a_%.bbappend
index 53e88d7e..e3c171dc 100644
--- a/recipes-bsp/trusted-firmware-a/trusted-firmware-a_%.bbappend
+++ b/recipes-bsp/trusted-firmware-a/trusted-firmware-a_%.bbappend
@@ -42,3 +42,7 @@ do_compile_append_j7200-hs-evm() {
 do_compile_append_j721s2-hs-evm() {
 	tfa_sign_k3hs
 }
+
+do_compile_append_j784s4-hs-evm() {
+	tfa_sign_k3hs
+}
diff --git a/recipes-security/optee/optee-os_%.bbappend b/recipes-security/optee/optee-os_%.bbappend
index 4a4ebfd7..2b591d58 100644
--- a/recipes-security/optee/optee-os_%.bbappend
+++ b/recipes-security/optee/optee-os_%.bbappend
@@ -81,6 +81,10 @@ do_compile_append_j721s2-hs-evm() {
     optee_sign_k3hs
 }
 
+do_compile_append_j784s4-hs-evm() {
+    optee_sign_k3hs
+}
+
 do_install_append_ti-soc() {
     install -m 644 ${B}/*.optee ${D}${nonarch_base_libdir}/firmware/ || true
     install -m 644 ${B}/bl32.bin ${D}${nonarch_base_libdir}/firmware/ || true