diff --git a/package/squashfs/Config.in b/package/squashfs/Config.in
index b0918567c0..385df1a5f9 100644
--- a/package/squashfs/Config.in
+++ b/package/squashfs/Config.in
@@ -2,6 +2,7 @@ config BR2_PACKAGE_SQUASHFS
 	bool "squashfs"
 	depends on BR2_LARGEFILE
 	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_USE_MMU # fork()
 	select BR2_PACKAGE_SQUASHFS_GZIP if !(BR2_PACKAGE_SQUASHFS_LZMA || BR2_PACKAGE_SQUASHFS_LZO)
 	help
 	  Tools to generate SquashFS filesystems.