diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index cc97f836e..f9a08c023 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -1808,6 +1808,22 @@ namespace {
             }
         }
 
+        const ScopeInfo3 * findScopeRecursive(const std::string & scope) const {
+            if (fullName.size() < scope.size() &&
+                fullName == scope.substr(0, fullName.size())) {
+                for (auto & child : children) {
+                    if (child.fullName == scope && &child != this)
+                        return &child;
+                    else {
+                        const ScopeInfo3 * temp1 = child.findScopeRecursive(scope);
+                        if (temp1)
+                            return temp1;
+                    }
+                }
+            }
+            return nullptr;
+        }
+
         const ScopeInfo3 * findScope(const std::string & scope) const {
             const ScopeInfo3 * tempScope = this;
             while (tempScope) {
@@ -1815,9 +1831,17 @@ namespace {
                     if (child.type == Record && (child.name == scope || child.fullName == scope))
                         return &child;
                 }
-
                 tempScope = tempScope->parent;
             }
+            // check for another scope with same name
+            const ScopeInfo3 * global = this;
+            while (global->parent)
+                global = global->parent;
+            for (const ScopeInfo3 & tempChild : global->children) {
+                const ScopeInfo3 * temp = tempChild.findScopeRecursive(scope);
+                if (temp)
+                    return temp;
+            }
             return nullptr;
         }
 
diff --git a/test/testsimplifyusing.cpp b/test/testsimplifyusing.cpp
index 394ae2668..1fa867532 100644
--- a/test/testsimplifyusing.cpp
+++ b/test/testsimplifyusing.cpp
@@ -80,6 +80,7 @@ private:
         TEST_CASE(simplifyUsing10054);
         TEST_CASE(simplifyUsing10136);
         TEST_CASE(simplifyUsing10171);
+        TEST_CASE(simplifyUsing10172);
     }
 
     std::string tok(const char code[], bool simplify = true, Settings::PlatformType type = Settings::Native, bool debugwarnings = true) {
@@ -1032,6 +1033,72 @@ private:
                            "void B :: f ( const std :: vector < unsigned char > & ) const { } "
                            "}";
         ASSERT_EQUALS(exp, tok(code, false));
+        ASSERT_EQUALS("", errout.str());
+    }
+
+    void simplifyUsing10172() {
+        {
+            const char code[] = "namespace ns {\n"
+                                "    class A {\n"
+                                "    public:\n"
+                                "        using h = std::function<void()>;\n"
+                                "    };\n"
+                                "    class B : public A {\n"
+                                "        void f(h);\n"
+                                "    };\n"
+                                "}\n"
+                                "namespace ns {\n"
+                                "    void B::f(h) { }\n"
+                                "}";
+            const char exp[] = "namespace ns { "
+                               "class A { "
+                               "public: "
+                               "} ; "
+                               "class B : public A { "
+                               "void f ( std :: function < void ( ) > ) ; "
+                               "} ; "
+                               "} "
+                               "namespace ns { "
+                               "void B :: f ( std :: function < void ( ) > ) { } "
+                               "}";
+            ASSERT_EQUALS(exp, tok(code, false));
+            ASSERT_EQUALS("", errout.str());
+        }
+        {
+            const char code[] = "namespace ns {\n"
+                                "namespace external {\n"
+                                "class A {\n"
+                                "public: \n"
+                                "  using h = std::function<void()>;\n"
+                                "};\n"
+                                "class B : public A {\n"
+                                "  void f(h);\n"
+                                "};\n"
+                                "}\n"
+                                "}\n"
+                                "namespace ns {\n"
+                                "namespace external {\n"
+                                "void B::f(h) {}\n"
+                                "}\n"
+                                "}";
+            const char exp[] = "namespace ns { "
+                               "namespace external { "
+                               "class A { "
+                               "public: "
+                               "} ; "
+                               "class B : public A { "
+                               "void f ( std :: function < void ( ) > ) ; "
+                               "} ; "
+                               "} "
+                               "} "
+                               "namespace ns { "
+                               "namespace external { "
+                               "void B :: f ( std :: function < void ( ) > ) { } "
+                               "} "
+                               "}";
+            ASSERT_EQUALS(exp, tok(code, false));
+            ASSERT_EQUALS("", errout.str());
+        }
     }
 };