diff --git a/debian/rules.real b/debian/rules.real
index 2d416e585..715018fdf 100644
--- a/debian/rules.real
+++ b/debian/rules.real
@@ -345,7 +345,7 @@ install-libc-dev_$(ARCH):
 # Move include/asm to arch-specific directory
 	mkdir -p $(OUT_DIR)/include/$(DEB_HOST_MULTIARCH)
 	mv $(OUT_DIR)/include/asm $(OUT_DIR)/include/$(DEB_HOST_MULTIARCH)/
-	test -d $(OUT_DIR)/include/arch && \
+	test ! -d $(OUT_DIR)/include/arch || \
 		mv $(OUT_DIR)/include/arch $(OUT_DIR)/include/$(DEB_HOST_MULTIARCH)/
 
 	+$(MAKE_SELF) install-base