diff --git a/build/targets/build_gdb.sh b/build/targets/build_gdb.sh
index 8c1bc60..c9a8b69 100755
--- a/build/targets/build_gdb.sh
+++ b/build/targets/build_gdb.sh
@@ -19,7 +19,7 @@ build_gdb() {
     CMD="CFLAGS=\"${GCC_OPTS}\" "
     CMD+="CXXFLAGS=\"${GXX_OPTS}\" "
     CMD+="LDFLAGS=\"-static -pthread\" "
-    if [ "$CURRENT_ARCH" != "x86" ] && "$CURRENT_ARCH" != "x86_64" ];then
+    if [ "$CURRENT_ARCH" != "x86" ] && [ "$CURRENT_ARCH" != "x86_64" ];then
         CMD+="CC_FOR_BUILD=\"/x86_64-linux-musl-cross/bin/x86_64-linux-musl-gcc\" "
         CMD+="CPP_FOR_BUILD=\"/x86_64-linux-musl-cross/bin/x86_64-linux-musl-g++\" "
     fi