diff --git a/build.sh b/build.sh
index 6888686..45b710c 100755
--- a/build.sh
+++ b/build.sh
@@ -158,9 +158,9 @@ done
 
 # Set default values
 KALI_ARCH=${KALI_ARCH:-$HOST_ARCH}
-if [ "$KALI_ARCH" == "x64" ]; then
+if [ "$KALI_ARCH" = "x64" ]; then
 	KALI_ARCH="amd64"
-elif [ "$KALI_ARCH" == "x86" ]; then
+elif [ "$KALI_ARCH" = "x86" ]; then
 	KALI_ARCH="i386"
 fi
 debug "KALI_ARCH: $KALI_ARCH"