diff --git a/devices/rockchip_armv8/patches/r6s.patch b/devices/rockchip_armv8/patches/r6s.patch
index e717bdc99df4..cab3e767b178 100644
--- a/devices/rockchip_armv8/patches/r6s.patch
+++ b/devices/rockchip_armv8/patches/r6s.patch
@@ -125,7 +125,7 @@
  include $(SUBTARGET).mk
  
 +define Image/Build
-+	if [[ $(PROFILE_SANITIZED) == "friendlyarm_nanopi-r6s" || $(PROFILE_SANITIZED) == "friendlyarm_nanopi-r6c" ]]; then \
++	if [[ "$(PROFILE_SANITIZED)" == "friendlyarm_nanopi-r6s" || "$(PROFILE_SANITIZED)" == "friendlyarm_nanopi-r6c" ]]; then \
 +		export IMG_PREFIX="$(IMG_PREFIX)$(if $(PROFILE_SANITIZED),-$(PROFILE_SANITIZED))"; \
 +		export BIN_DIR=$(BIN_DIR); \
 +		export TOPDIR=$(TOPDIR); \