diff --git a/include/u-boot.mk b/include/u-boot.mk
index 4b3ff69d6b..5bcf0315d3 100644
--- a/include/u-boot.mk
+++ b/include/u-boot.mk
@@ -42,7 +42,7 @@ TARGET_DEP = TARGET_$(BUILD_TARGET)$(if $(BUILD_SUBTARGET),_$(BUILD_SUBTARGET))
 
 UBOOT_MAKE_FLAGS = \
 	HOSTCC="$(HOSTCC)" \
-	HOSTCFLAGS='$(HOST_CFLAGS) $$$$(HOSTCPPFLAGS)' \
+	HOSTCFLAGS="$(HOST_CFLAGS) $(HOST_CPPFLAGS)" \
 	HOSTLDFLAGS=""
 
 define Build/U-Boot/Target
diff --git a/package/boot/at91bootstrap/at91bootstrap.mk b/package/boot/at91bootstrap/at91bootstrap.mk
index dda5fa4e9c..92353ff969 100644
--- a/package/boot/at91bootstrap/at91bootstrap.mk
+++ b/package/boot/at91bootstrap/at91bootstrap.mk
@@ -26,7 +26,7 @@ TARGET_DEP = TARGET_$(BUILD_TARGET)$(if $(BUILD_SUBTARGET),_$(BUILD_SUBTARGET))
 
 AT91BOOTSTRAP_MAKE_FLAGS = \
 	HOSTCC="$(HOSTCC)" \
-	HOSTCFLAGS='$(HOST_CFLAGS) $$$$(HOSTCPPFLAGS)' \
+	HOSTCFLAGS="$(HOST_CFLAGS) $(HOST_CPPFLAGS)" \
 	HOSTLDFLAGS=""
 
 define Build/AT91Bootstrap/Target