diff --git a/cpp/srs_db/download_ignition_lagrange.sh b/cpp/srs_db/download_ignition_lagrange.sh
index 8dc9cb76f6..3ca549d324 100755
--- a/cpp/srs_db/download_ignition_lagrange.sh
+++ b/cpp/srs_db/download_ignition_lagrange.sh
@@ -19,7 +19,7 @@ num_transcripts=${1:-25}
 ARGS=$(seq 1 $num_transcripts)
 
 checksum() {
-  grep transcript_${1}.dat checksums | sha256sum -c
+  grep transcript_${1}.dat checksums | shasum -a 256 -c
   return $?
 }