diff --git a/virtualmin-install.sh b/virtualmin-install.sh
index af22e8f..d559ae6 100644
--- a/virtualmin-install.sh
+++ b/virtualmin-install.sh
@@ -18,7 +18,7 @@
 # License and version
 SERIAL=GPL
 KEY=GPL
-VER=7.3.1
+VER=7.3.2
 vm_version=7
 
 # Server
@@ -364,7 +364,7 @@ grade_b_system() {
   return 1
 }
 
-if grade_b_system && [ "$unstable" = 'unstable' ]; then
+if grade_b_system && [ "$unstable" != 'unstable' ]; then
   log_error "Unsupported operating system detected. You may be able to install with"
   log_error "the --unstable flag, but this is not recommended. Consult the installation"
   log_error "documentation."