diff --git a/lib/symboldatabase.cpp b/lib/symboldatabase.cpp
index 0fc60766329..99cede92bfe 100644
--- a/lib/symboldatabase.cpp
+++ b/lib/symboldatabase.cpp
@@ -1510,6 +1510,16 @@ void SymbolDatabase::createSymbolDatabaseIncompleteVars()
             continue;
         if (mSettings.standards.cpp >= Standards::CPP20 && cpp20keywords.count(tok->str()) > 0)
             continue;
+        std::string fstr = tok->str();
+        const Token* ftok = tok->previous();
+        while (Token::simpleMatch(ftok, "::")) {
+            if (!Token::Match(ftok->previous(), "%name%"))
+                break;
+            fstr.insert(0, ftok->previous()->str() + "::");
+            ftok = ftok->tokAt(-2);
+        }
+        if (mSettings.library.functions.find(fstr) != mSettings.library.functions.end())
+            continue;
         const_cast<Token *>(tok)->isIncompleteVar(true); // TODO: avoid const_cast
     }
 }
diff --git a/test/testsymboldatabase.cpp b/test/testsymboldatabase.cpp
index 46167ec548f..8fab8b21fac 100644
--- a/test/testsymboldatabase.cpp
+++ b/test/testsymboldatabase.cpp
@@ -5464,6 +5464,21 @@ class TestSymbolDatabase : public TestFixture {
             const Token* s4 = Token::findsimplematch(s3->next(), "string )");
             ASSERT(s4 && !s4->isIncompleteVar());
         }
+        {
+            GET_SYMBOL_DB("void destroy(int*, void (*cb_dealloc)(void *));\n"
+                          "void f(int* p, int* q, int* r) {\n"
+                          "    destroy(p, free);\n"
+                          "    destroy(q, std::free);\n"
+                          "    destroy(r, N::free);\n"
+                          "}\n");
+            ASSERT(db && errout.str().empty());
+            const Token* free1 = Token::findsimplematch(tokenizer.tokens(), "free");
+            ASSERT(free1 && !free1->isIncompleteVar());
+            const Token* free2 = Token::findsimplematch(free1->next(), "free");
+            ASSERT(free2 && !free2->isIncompleteVar());
+            const Token* free3 = Token::findsimplematch(free2->next(), "free");
+            ASSERT(free3 && free3->isIncompleteVar());
+        }
     }
 
     void enum1() {