diff --git a/tools/singularity/rocky8.def b/tools/singularity/rocky8.def
index ea74a50339..098fd2b868 100644
--- a/tools/singularity/rocky8.def
+++ b/tools/singularity/rocky8.def
@@ -74,7 +74,7 @@ EOF
         CUSTOM_PROMPT_ENV=/.singularity.d/env/99-zz_custom_prompt.sh
         cat >$CUSTOM_PROMPT_ENV <<EOF
 #!/bin/bash
-PS1="[centos8:\u@\h] \W> "
+PS1="[rocky8:\u@\h] \W> "
 EOF
         chmod 755 $CUSTOM_PROMPT_ENV