diff --git a/package/c-icap/Config.in b/package/c-icap/Config.in
index f949c16fa1..8121a26a65 100644
--- a/package/c-icap/Config.in
+++ b/package/c-icap/Config.in
@@ -2,6 +2,7 @@ config BR2_PACKAGE_C_ICAP
 	bool "c-icap"
 	depends on !BR2_PREFER_STATIC_LIB
 	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_USE_MMU # fork()
 	help
 	  c-icap is an implementation of an ICAP server. It can be
 	  used with HTTP proxies that support the ICAP protocol to
@@ -13,4 +14,5 @@ config BR2_PACKAGE_C_ICAP
 	  http://c-icap.sourceforge.net/
 
 comment "c-icap needs a toolchain w/ threads and dynamic library"
+	depends on BR2_USE_MMU
 	depends on BR2_PREFER_STATIC_LIB  || !BR2_TOOLCHAIN_HAS_THREADS