diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index db30349dba7..0e1e847781d 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -1125,6 +1125,8 @@ void Tokenizer::simplifyTypedef()
             list.front()->deleteThis();
     }
 
+    validate();
+
     simplifyTypedefCpp();
 }
 
diff --git a/test/cli/fuzz-crash/crash-0400fbfed5c89e368e436dbac630db0f80db94bd b/test/cli/fuzz-crash/crash-0400fbfed5c89e368e436dbac630db0f80db94bd
new file mode 100644
index 00000000000..d6e9b32be37
--- /dev/null
+++ b/test/cli/fuzz-crash/crash-0400fbfed5c89e368e436dbac630db0f80db94bd
@@ -0,0 +1 @@
+typedef i(*const type2)();typedef t(ty)();(v ty)type2()