diff --git a/lib/checkleakautovar.cpp b/lib/checkleakautovar.cpp
index 0a9d1406e..c1012de11 100644
--- a/lib/checkleakautovar.cpp
+++ b/lib/checkleakautovar.cpp
@@ -232,7 +232,7 @@ void CheckLeakAutoVar::checkScope(const Token * const startToken,
 
             // allocation?
             if (Token::Match(tok->tokAt(2), "%type% (")) {
-                int i = _settings->library.alloc(tok->strAt(2));
+                int i = _settings->library.alloc(tok->tokAt(2));
                 if (i > 0) {
                     alloctype[tok->varId()] = i;
                 }
@@ -255,7 +255,7 @@ void CheckLeakAutoVar::checkScope(const Token * const startToken,
                 if (innerTok->str() == ")")
                     break;
                 if (innerTok->str() == "(" && innerTok->previous()->isName()) {
-                    const int deallocId = _settings->library.dealloc(tok->str());
+                    const int deallocId = _settings->library.dealloc(tok);
                     functionCall(innerTok->previous(), varInfo, deallocId);
                     innerTok = innerTok->link();
                 }
@@ -343,7 +343,7 @@ void CheckLeakAutoVar::checkScope(const Token * const startToken,
 
         // Function call..
         else if (Token::Match(tok, "%type% (") && tok->str() != "return") {
-            const int dealloc = _settings->library.dealloc(tok->str());
+            const int dealloc = _settings->library.dealloc(tok);
 
             functionCall(tok, varInfo, dealloc);
 
diff --git a/lib/checkmemoryleak.cpp b/lib/checkmemoryleak.cpp
index 168a43209..1c4dd2187 100644
--- a/lib/checkmemoryleak.cpp
+++ b/lib/checkmemoryleak.cpp
@@ -180,7 +180,7 @@ CheckMemoryLeak::AllocType CheckMemoryLeak::getAllocationType(const Token *tok2,
         }
 
         // Does tok2 point on "g_malloc", "g_strdup", ..
-        const int alloctype = settings1->library.alloc(tok2->str());
+        const int alloctype = settings1->library.alloc(tok2);
         if (alloctype > 0) {
             if (alloctype == settings1->library.dealloc("free"))
                 return Malloc;
@@ -271,7 +271,7 @@ CheckMemoryLeak::AllocType CheckMemoryLeak::getDeallocationType(const Token *tok
 
     // Does tok2 point on "g_free", etc ..
     if (Token::Match(tok, "%type% ( %varid% )", varid)) {
-        const int dealloctype = settings1->library.dealloc(tok->str());
+        const int dealloctype = settings1->library.dealloc(tok);
         if (dealloctype > 0)
             return Library::ismemory(dealloctype) ? OtherMem : OtherRes;
     }
@@ -309,7 +309,7 @@ CheckMemoryLeak::AllocType CheckMemoryLeak::getDeallocationType(const Token *tok
         return Pipe;
 
     if (Token::Match(tok, ("%type% ( " + varname + " )").c_str())) {
-        int type = settings1->library.dealloc(tok->str());
+        int type = settings1->library.dealloc(tok);
         if (type > 0)
             return Library::ismemory(type) ? OtherMem : OtherRes;
     }
@@ -2764,7 +2764,7 @@ void CheckMemoryLeakNoVar::checkForUnusedReturnValue(const Scope *scope)
     for (const Token *tok = scope->classStart; tok != scope->classEnd; tok = tok->next()) {
         if (Token::Match(tok, "{|}|; %var% (")) {
             tok = tok->next();
-            const int allocationId = _settings->library.alloc(tok->str());
+            const int allocationId = _settings->library.alloc(tok);
             if (allocationId > 0)
                 returnValueNotUsedError(tok, tok->str());
         }
diff --git a/lib/library.h b/lib/library.h
index 16f09eb8b..d3b20c91b 100644
--- a/lib/library.h
+++ b/lib/library.h
@@ -24,6 +24,7 @@
 #include "config.h"
 #include "path.h"
 #include "mathlib.h"
+#include "token.h"
 
 #include <map>
 #include <set>
@@ -50,13 +51,23 @@ public:
     bool loadxmldata(const char xmldata[], std::size_t len);
     bool load(const tinyxml2::XMLDocument &doc);
 
-    /** get allocation id for function (by name) */
-    int alloc(const std::string &name) const {
+    /** get allocation id for function by name */
+    int alloc(const char name[]) const {
         return getid(_alloc, name);
     }
 
-    /** get deallocation id for function (by name) */
-    int dealloc(const std::string &name) const {
+    /** get allocation id for function */
+    int alloc(const Token *tok) const {
+        return tok->function() ? 0 : getid(_alloc, tok->str());
+    }
+
+    /** get deallocation id for function */
+    int dealloc(const Token *tok) const {
+        return tok->function() ? 0 : getid(_dealloc, tok->str());
+    }
+
+    /** get deallocation id for function by name */
+    int dealloc(const char name[]) const {
         return getid(_dealloc, name);
     }