diff --git a/install.sh b/install.sh
index d787c36..3dd1ff2 100755
--- a/install.sh
+++ b/install.sh
@@ -249,7 +249,7 @@ if [ "$1" = "install" ] || [ "$1" = "config" ]; then
     ;;
   esac
 
-  if [ "$opt_alternative_url" = "true" ]; then
+  if [ "$opt_alternative_url" != "true" ]; then
     wget "https://raw.githubusercontent.com/graysky2/kernel_gcc_patch/master/more-uarches-for-gcc-v10-and-kernel-${opt_ver}.patch"
   else
     wget "https://raw.githubusercontent.com/graysky2/kernel_gcc_patch/master/outdated_versions/enable_additional_cpu_optimizations_for_gcc_v10.1+_kernel_v${opt_ver}.patch"