diff --git a/ghc-deps.sh b/ghc-deps.sh
index c3a0c95..3435c7e 100755
--- a/ghc-deps.sh
+++ b/ghc-deps.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 # find rpm provides and requires for Haskell GHC libraries
 
-[ $# -lt 3 ] && echo "Usage: $(basename "$0") [--provides|--requires] %{buildroot} %{ghclibdir} [ghc-version]" && exit 1
+[ $# -lt 3 ] && echo "Usage: $(basename "$0") [--provides|--requires] %{buildroot} %{ghclibdir} [ghc-<version>]" && exit 1
 
 set +x -e