diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index db30349dba7..aa4302198e2 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -5707,6 +5707,8 @@ bool Tokenizer::simplifyTokenList1(const char FileName[])
     if (isCPP())
         simplifyExternC();
 
+    validate();
+
     // simplify compound statements: "[;{}] ( { code; } ) ;"->"[;{}] code;"
     simplifyCompoundStatements();
 
diff --git a/test/cli/fuzz-crash/crash-be54fe1da04e7a624214b58f3b572b87082a2e93 b/test/cli/fuzz-crash/crash-be54fe1da04e7a624214b58f3b572b87082a2e93
new file mode 100644
index 00000000000..e263f9d8c66
--- /dev/null
+++ b/test/cli/fuzz-crash/crash-be54fe1da04e7a624214b58f3b572b87082a2e93
@@ -0,0 +1 @@
+(({}namespace d=n));