diff --git a/include/hardware/keymaster_defs.h b/include/hardware/keymaster_defs.h
index b45e785..0f9bc27 100644
--- a/include/hardware/keymaster_defs.h
+++ b/include/hardware/keymaster_defs.h
@@ -518,7 +518,7 @@
 
 #define KEYMASTER_SIMPLE_COMPARE(a, b) (a < b) ? -1 : ((a > b) ? 1 : 0)
 inline int keymaster_param_compare(const keymaster_key_param_t* a, const keymaster_key_param_t* b) {
-    int retval = KEYMASTER_SIMPLE_COMPARE(a->tag, b->tag);
+    int retval = KEYMASTER_SIMPLE_COMPARE((uint32_t)a->tag, (uint32_t)b->tag);
     if (retval != 0)
         return retval;