diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index e82ae7091..35b307c9b 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -3167,6 +3167,9 @@ bool Tokenizer::simplifyTokenList1(const char FileName[])
     if (_settings->terminated())
         return false;
 
+    // Simplify the C alternative tokens (and, or, etc.)
+    simplifyCAlternativeTokens();
+
     // replace 'NULL' and similar '0'-defined macros with '0'
     simplifyNull();
 
@@ -3480,9 +3483,6 @@ bool Tokenizer::simplifyTokenList1(const char FileName[])
     // Link < with >
     createLinks2();
 
-    // Simplify the C alternative tokens (and, or, etc.)
-    simplifyCAlternativeTokens();
-
     // The simplify enum might have inner loops
     if (_settings->terminated())
         return false;
diff --git a/test/testsimplifytokens.cpp b/test/testsimplifytokens.cpp
index 216597e23..72e781158 100644
--- a/test/testsimplifytokens.cpp
+++ b/test/testsimplifytokens.cpp
@@ -2814,7 +2814,7 @@ private:
     }
 
     void cAlternativeTokens() {
-        ASSERT_EQUALS("void f ( ) { err |= ( ( r & s ) && ! t ) ; }",
+        ASSERT_EQUALS("void f ( ) { err = err | ( ( r & s ) && ! t ) ; }",
                       tok("void f() { err or_eq ((r bitand s) and not t); }", false));
         ASSERT_EQUALS("void f ( ) const { r = f ( a [ 4 ] | 15 , ~ c , ! d ) ; }",
                       tok("void f() const { r = f(a[4] bitor 0x0F, compl c, not d) ; }", false));
diff --git a/test/testtokenize.cpp b/test/testtokenize.cpp
index 8584086d7..0c1b46e1e 100644
--- a/test/testtokenize.cpp
+++ b/test/testtokenize.cpp
@@ -8186,6 +8186,12 @@ private:
         ASSERT_EQUALS("void f ( ) { if ( ~ b ) { ; } }", tokenizeAndStringify("void f() { if (compl b); }"));
         ASSERT_EQUALS("void f ( ) { if ( ! b ) { ; } }", tokenizeAndStringify("void f() { if (not b); }"));
         ASSERT_EQUALS("void f ( ) { if ( a != b ) { ; } }", tokenizeAndStringify("void f() { if (a not_eq b); }"));
+
+        ASSERT_EQUALS("\n" // #6029
+                      "\n"
+                      "##file 0\n"
+                      "1: void f ( bool b@1 ) { if ( ! b@1 ) { ; } }\n",
+                      tokenizeDebugListing("void f(bool b) { if (not b); }"));
     }
 
     void simplifyCalculations() {