diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index 436a6655284..06a8edf6e78 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -3778,7 +3778,7 @@ void Tokenizer::concatenateNegativeNumberAndAnyPositive()
         if (tok->findOpeningBracket())
             continue;
 
-        if (!tok->tokAt(2) || (tok->tokAt(2)->isOp() && !Token::Match(tok->tokAt(2), "[+-*]")))
+        if (!tok->tokAt(2) || (tok->tokAt(2)->isOp() && !Token::Match(tok->tokAt(2), "[+-*!~]")))
             syntaxError(tok);
 
         while ((tok->isArithmeticalOp() || tok->isComparisonOp()) && tok->str() != ">" && tok->next() && tok->strAt(1) == "+" &&
diff --git a/test/testtokenize.cpp b/test/testtokenize.cpp
index d5c770169e4..63bf525dea6 100644
--- a/test/testtokenize.cpp
+++ b/test/testtokenize.cpp
@@ -8195,6 +8195,17 @@ class TestTokenizer : public TestFixture {
 
         ASSERT_EQUALS(";", tokenizeAndStringify("typedef std::size_t size_t;\n")); // #14809
         ASSERT_EQUALS("struct S { int i { 0 } ; } ;", tokenizeAndStringify("struct S { int i : 1{0}; };\n")); // #15070
+
+        ASSERT_EQUALS( // #15183
+            "int f ( int i ) {\n"
+            "if ( i > 0 ) {\n"
+            "return - ! ! i ; }\n"
+            "return - ~ i ;\n"
+            "}", tokenizeAndStringify("int f(int i) {\n"
+                                      "    if (i > 0)\n"
+                                      "        return -!!i;\n"
+                                      "    return -~i;\n"
+                                      "}\n"));
     }