diff --git a/package/shadow/Config.in b/package/shadow/Config.in
index 230271af7d..b08b06457b 100644
--- a/package/shadow/Config.in
+++ b/package/shadow/Config.in
@@ -2,6 +2,7 @@ menuconfig BR2_PACKAGE_SHADOW
 	bool "shadow"
 	depends on !BR2_STATIC_LIBS
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_14
+	depends on !BR2_TOOLCHAIN_USES_UCLIBC # reallocarray, explicit_bzero
 	help
 	  Utilities to deal with user accounts.
 
@@ -55,5 +56,6 @@ config BR2_PACKAGE_SHADOW_YESCRYPT
 
 endif # BR2_PACKAGE_SHADOW
 
-comment "shadow needs a toolchain w/ headers >= 4.14, dynamic library"
-	depends on !BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_14 || BR2_STATIC_LIBS
+comment "shadow needs a glibc or musl toolchain w/ headers >= 4.14, dynamic library"
+	depends on !BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_14 || \
+		BR2_STATIC_LIBS || BR2_TOOLCHAIN_USES_UCLIBC