diff --git a/package/duma/Config.in b/package/duma/Config.in
index e9cc9b2fd7..7679e647c2 100644
--- a/package/duma/Config.in
+++ b/package/duma/Config.in
@@ -2,6 +2,10 @@ config BR2_PACKAGE_DUMA
 	bool "duma"
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_TOOLCHAIN_HAS_THREADS
+	# By design, duma uses page mapping to isolate
+	# allocations. Non-MMU platforms cannot perform such
+	# things.
+	depends on BR2_USE_MMU
 	help
 	  D.U.M.A. - Detect Unintended Memory Access. A fork of the
 	  Electric Fence library. Detects buffer overflow and
@@ -17,4 +21,5 @@ config BR2_PACKAGE_DUMA_NO_LEAKDETECTION
 endif # BR2_PACKAGE_DUMA
 
 comment "duma needs a toolchain w/ C++, threads"
+	depends on BR2_USE_MMU
 	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS