diff --git a/tools/occlum_build.mk b/tools/occlum_build.mk
index f202ae60..acd7c699 100644
--- a/tools/occlum_build.mk
+++ b/tools/occlum_build.mk
@@ -14,8 +14,8 @@ LIB_LINKS := libocclum-pal.so.$(major_ver) libocclum-pal.so
 LIB_LINKS := $(addprefix $(instance_dir)/build/lib/, $(LIB_LINKS))
 
 ifneq (, $(wildcard $(IMAGE)/. ))
-	IMAGE_DIRS := $(shell find $(IMAGE) -type d 2>/dev/null || true)
-	IMAGE_FILES := $(shell find $(IMAGE) -type f 2>/dev/null || true)
+	IMAGE_DIRS := $(shell find $(IMAGE) -type d 2>/dev/null | sed 's/ /\\ /g' || true)
+	IMAGE_FILES := $(shell find $(IMAGE) -type f 2>/dev/null | sed 's/ /\\ /g' || true)
 endif
 
 SHELL:=/bin/bash