diff --git a/crates/serde/rules.mk b/crates/serde/rules.mk
index 7de6d869..13776636 100644
--- a/crates/serde/rules.mk
+++ b/crates/serde/rules.mk
@@ -14,9 +14,16 @@ MODULE_RUSTFLAGS += \
 	--cfg 'feature="default"' \
 	--cfg 'feature="derive"' \
 	--cfg 'feature="serde_derive"' \
-	--cfg 'feature="std"'
+
+ifeq ($(call TOBOOL,$(TRUSTY_USERSPACE)),true)
+
+MODULE_RUSTFLAGS += \
+	--cfg 'feature="std"' \
+
+endif
 
 MODULE_LIBRARY_DEPS := \
-	$(call FIND_CRATE,serde_derive)
+	trusty/user/base/lib/liballoc-rust \
+	$(call FIND_CRATE,serde_derive) \
 
 include make/library.mk