diff --git a/arch/riscv/dts/binman.dtsi b/arch/riscv/dts/binman.dtsi
index b8fc8f7f35..156cb00971 100644
--- a/arch/riscv/dts/binman.dtsi
+++ b/arch/riscv/dts/binman.dtsi
@@ -45,6 +45,7 @@
 
 					opensbi_blob: opensbi {
 						filename = "fw_dynamic.bin";
+						missing-msg = "opensbi";
 					};
 				};
 
diff --git a/tools/binman/missing-blob-help b/tools/binman/missing-blob-help
index c61ca02a35..4448ac9311 100644
--- a/tools/binman/missing-blob-help
+++ b/tools/binman/missing-blob-help
@@ -37,3 +37,9 @@ https://github.com/siemens/k3-rti-wdt.
 tee-os:
 See the documentation for your board. You may need to build Open Portable
 Trusted Execution Environment (OP-TEE) with TEE=/path/to/tee.bin
+
+opensbi:
+See the documentation for your board. The OpenSBI git repo is at
+https://github.com/riscv/opensbi.git
+You may need to build fw_dynamic.bin first and re-build u-boot with
+OPENSBI=/path/to/fw_dynamic.bin