diff --git a/addons/cppcheckdata.py b/addons/cppcheckdata.py
index 57a7320a2..540edf868 100755
--- a/addons/cppcheckdata.py
+++ b/addons/cppcheckdata.py
@@ -1217,16 +1217,18 @@ def ArgumentParser():
 
 def get_files(args):
     """Return dump_files, ctu_info_files"""
-    dump_files = args.dumpfile
-    ctu_info_files = []
+    all_files = args.dumpfile
     if args.file_list:
         with open(args.file_list, 'rt') as f:
             for line in f.readlines():
-                line = line.rstrip()
-                if line.endswith('.ctu-info'):
-                    ctu_info_files.append(line)
-                else:
-                    dump_files.append(line)
+                all_files.append(line.rstrip())
+    dump_files = []
+    ctu_info_files = []
+    for f in all_files:
+        if f.endswith('.ctu-info'):
+            ctu_info_files.append(f)
+        else:
+            dump_files.append(f)
     return dump_files, ctu_info_files
 
 
diff --git a/addons/misra.py b/addons/misra.py
index b2fd5b660..f3125bf3e 100755
--- a/addons/misra.py
+++ b/addons/misra.py
@@ -3611,6 +3611,9 @@ class MisraChecker:
 
         from cppcheckdata import Location
 
+        def is_different_location(loc1, loc2):
+            return loc1['file'] != loc2['file'] or loc1['line'] != loc2['line']
+
         for filename in ctu_info_files:
             for line in open(filename, 'rt'):
                 if not line.startswith('{'):
@@ -3626,7 +3629,7 @@ class MisraChecker:
                         for old_typedef_info in all_typedef_info:
                             if old_typedef_info['name'] == new_typedef_info['name']:
                                 found = True
-                                if old_typedef_info['file'] != new_typedef_info['file'] or old_typedef_info['line'] != new_typedef_info['line']:
+                                if is_different_location(old_typedef_info, new_typedef_info):
                                     self.reportError(Location(old_typedef_info), 5, 6)
                                     self.reportError(Location(new_typedef_info), 5, 6)
                                 else:
@@ -3642,7 +3645,7 @@ class MisraChecker:
                         for old_tagname_info in all_tagname_info:
                             if old_tagname_info['name'] == new_tagname_info['name']:
                                 found = True
-                                if old_tagname_info['file'] != new_tagname_info['file'] or old_tagname_info['line'] != new_tagname_info['line']:
+                                if is_different_location(old_tagname_info, new_tagname_info):
                                     self.reportError(Location(old_tagname_info), 5, 7)
                                     self.reportError(Location(new_tagname_info), 5, 7)
                                 else:
@@ -3664,8 +3667,11 @@ class MisraChecker:
                         if not found:
                             all_macro_info.append(new_macro)
 
-                if summary_type == 'MisraGlobalIdentifiers':
+                if summary_type == 'MisraExternalIdentifiers':
                     for s in summary_data:
+                        if s['name'] in all_external_identifiers and is_different_location(s, all_external_identifiers[s['name']]):
+                            self.reportError(Location(s), 8, 5)
+                            self.reportError(Location(all_external_identifiers[s['name']]), 8, 5)
                         all_external_identifiers[s['name']] = s
 
                 if summary_type == 'MisraInternalIdentifiers':
diff --git a/addons/test/misra/misra-ctu-1-test.c b/addons/test/misra/misra-ctu-1-test.c
index 6609a2be8..0e583ab68 100644
--- a/addons/test/misra/misra-ctu-1-test.c
+++ b/addons/test/misra/misra-ctu-1-test.c
@@ -29,3 +29,7 @@ static void misra_5_8_f(void) {}
 static int misra_5_9_count;
 // cppcheck-suppress misra-c2012-5.9
 static void misra_5_8_foo(void) {}
+
+// cppcheck-suppress misra-c2012-8.4
+// cppcheck-suppress misra-c2012-8.5
+extern int misra_8_5;
diff --git a/addons/test/misra/misra-ctu-2-test.c b/addons/test/misra/misra-ctu-2-test.c
index 319a8baaf..d98b07124 100644
--- a/addons/test/misra/misra-ctu-2-test.c
+++ b/addons/test/misra/misra-ctu-2-test.c
@@ -30,3 +30,7 @@ void misra_5_8_f(void) {
 static int misra_5_9_count;
 // cppcheck-suppress misra-c2012-5.9
 static void misra_5_8_foo(void) {}
+
+// cppcheck-suppress misra-c2012-8.4
+// cppcheck-suppress misra-c2012-8.5
+extern int misra_8_5;