diff --git a/core/config_sanitizers.mk b/core/config_sanitizers.mk
index e2ac03c..d9a4e67 100644
--- a/core/config_sanitizers.mk
+++ b/core/config_sanitizers.mk
@@ -12,7 +12,7 @@
 my_global_sanitize_diag :=
 ifeq ($(my_clang),true)
   ifdef LOCAL_IS_HOST_MODULE
-    ifneq ($(HOST_CROSS_OS),windows)
+    ifneq ($($(my_prefix)OS),windows)
       my_global_sanitize := $(strip $(SANITIZE_HOST))
 
       # SANITIZE_HOST=true is a deprecated way to say SANITIZE_HOST=address.