diff --git a/src/json-validator.cpp b/src/json-validator.cpp
index 62ce97c..dc39383 100644
--- a/src/json-validator.cpp
+++ b/src/json-validator.cpp
@@ -1076,6 +1076,9 @@ class object : public schema
 				a_prop_or_pattern_matched = true;
 				schema_p->second->validate(ptr / p.key(), p.value(), patch, e);
 			}
+			else {
+				patch.remove(ptr / p.key());
+			}
 
 #ifndef NO_STD_REGEX
 			// check all matching patternProperties