diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index ff38a1df22f71dc84209550c1c6fdf3ce776e02d..0ec4d6ea1e4b8d7729a2299702391ab3f504e914 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -353,6 +353,7 @@ unsigned mtd_mmap_capabilities(struct mtd_info *mtd)
 		return NOMMU_MAP_COPY;
 	}
 }
+EXPORT_SYMBOL_GPL(mtd_mmap_capabilities);
 #endif
 
 /**