diff --git a/src/parser/Parser.rl b/src/parser/Parser.rl
index 6f4fd80a..52b3340c 100644
--- a/src/parser/Parser.rl
+++ b/src/parser/Parser.rl
@@ -569,6 +569,9 @@ unichar readUtf8CodePoint4c(const char *s) {
             assert(0); // Should have thrown a parse error.
             throw LocatedParseError("Unknown control verb");
         };
+        any => {
+            throw LocatedParseError("Unknown control verb");
+        };
     *|;
 
     #############################################################
diff --git a/unit/hyperscan/bad_patterns.txt b/unit/hyperscan/bad_patterns.txt
index d4de452a..d970761a 100644
--- a/unit/hyperscan/bad_patterns.txt
+++ b/unit/hyperscan/bad_patterns.txt
@@ -135,3 +135,4 @@
 138:/(*UNKNOWNVERB)foobar/ #Unknown control verb (*UNKNOWNVERB) at index 0.
 139:/foo(*UTF8)bar/ #(*UTF8) must be at start of expression, encountered at index 5.
 140:/(?i)(*UTF8)foobar/ #(*UTF8) must be at start of expression, encountered at index 6.
+141:/(*@&/ #Unknown control verb at index 2.