diff --git a/configure b/configure
index 731678bc2..4911481ad 100755
--- a/configure
+++ b/configure
@@ -309,11 +309,11 @@ for i in "$@"; do
 			CONFIG[OCF_PATH]=
 			;;
 		--with-isal)
-                        CONFIG[ISAL]=y
-                        ;;
-                --without-isal)
-                        CONFIG[ISAL]=n
-                        ;;
+			CONFIG[ISAL]=y
+			;;
+		--without-isal)
+			CONFIG[ISAL]=n
+			;;
 		--)
 			break
 			;;
@@ -425,7 +425,7 @@ than or equal to 4.14 will see significantly reduced performance.
 fi
 
 if [[ "${CONFIG[ISAL]}" = "y" ]] || [[ "${CONFIG[CRYPTO]}" = "y" ]]; then
-        if [[ $(nasm -v | awk '{print $3}' | sed 's/[^0-9]*//g') -lt "21202" ]]; then
+	if [[ $(nasm -v | awk '{print $3}' | sed 's/[^0-9]*//g') -lt "21202" ]]; then
 		echo "Notice: ISA-L, compression & crypto auto-disabled due to nasm dependency."
 		echo "These features require NASM version 2.12.02 or newer.  Please install"
 		echo "or upgrade then re-run this script."