diff --git a/package/optee-client/Config.in b/package/optee-client/Config.in
index 538948b72c..4061164cbb 100644
--- a/package/optee-client/Config.in
+++ b/package/optee-client/Config.in
@@ -2,6 +2,7 @@ config BR2_PACKAGE_OPTEE_CLIENT
 	bool "optee-client"
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3 # MMC_IOC_MULTI_CMD
+	depends on BR2_USE_MMU # fork()
 	help
 	  Enable the OP-TEE client package that brings non-secure
 	  client application resources for OP-TEE support. OP-TEE
@@ -48,5 +49,6 @@ config BR2_PACKAGE_OPTEE_CLIENT_TEEACL
 endif
 
 comment "optee-client needs a toolchain w/ threads, headers >= 4.3"
+	depends on BR2_USE_MMU
 	depends on !BR2_TOOLCHAIN_HAS_THREADS || \
 		!BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3
diff --git a/package/optee-examples/Config.in b/package/optee-examples/Config.in
index 843981a458..eb6ee16502 100644
--- a/package/optee-examples/Config.in
+++ b/package/optee-examples/Config.in
@@ -4,6 +4,7 @@ config BR2_PACKAGE_OPTEE_EXAMPLES
 	depends on BR2_TOOLCHAIN_HAS_THREADS # optee-client
 	depends on !BR2_STATIC_LIBS # optee-client
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3 # optee-client
+	depends on BR2_USE_MMU # optee-client
 	select BR2_PACKAGE_OPTEE_CLIENT
 	select BR2_TARGET_OPTEE_OS_SDK
 	help
@@ -22,5 +23,6 @@ config BR2_PACKAGE_OPTEE_EXAMPLES
 
 comment "optee-examples needs a toolchain w/ threads, dynamic library, headers >= 4.3"
 	depends on BR2_TARGET_OPTEE_OS
+	depends on BR2_USE_MMU
 	depends on !BR2_TOOLCHAIN_HAS_THREADS || BR2_STATIC_LIBS || \
 		!BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3
diff --git a/package/optee-test/Config.in b/package/optee-test/Config.in
index cf36d19fab..57a7834c75 100644
--- a/package/optee-test/Config.in
+++ b/package/optee-test/Config.in
@@ -5,6 +5,7 @@ config BR2_PACKAGE_OPTEE_TEST
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on !BR2_STATIC_LIBS # optee-client
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3 # optee-client
+	depends on BR2_USE_MMU # optee-client
 	select BR2_PACKAGE_OPTEE_CLIENT
 	select BR2_TARGET_OPTEE_OS_SDK
 	help
@@ -27,5 +28,6 @@ config BR2_PACKAGE_OPTEE_TEST
 
 comment "optee-test needs a toolchain w/ threads, C++, dynamic library, headers >= 4.3"
 	depends on BR2_TARGET_OPTEE_OS
+	depends on BR2_USE_MMU
 	depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_INSTALL_LIBSTDCPP || \
 		BR2_STATIC_LIBS || !BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3