diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0789f822e..c08e8159c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ All notable changes to this project will be documented in this file.
 - [#1511], [#1765] Quick search tree (Ctrl+F) for everything, not just AS3 classes
 - Quick search (Ctrl+F) for tag list view
 - [#1884] Memory search - show size and adress in hex, show only aligned to N bytes
+- AS3 - "internal" keyword support
 
 ### Fixed
 - [#1897] Close menu button without selecting specific item
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/ActionScript3Parser.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/ActionScript3Parser.java
index a42e483ce..be25a688f 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/ActionScript3Parser.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/avm2/parser/script/ActionScript3Parser.java
@@ -659,7 +659,7 @@ public class ActionScript3Parser {
             List<Map.Entry<String, Map<String, String>>> metadata = parseMetadata();
             s = lex();
 
-            while (s.isType(SymbolType.STATIC, SymbolType.PUBLIC, SymbolType.PRIVATE, SymbolType.PROTECTED, SymbolType.OVERRIDE, SymbolType.FINAL, SymbolType.DYNAMIC, SymbolGroup.IDENTIFIER)) {
+            while (s.isType(SymbolType.STATIC, SymbolType.PUBLIC, SymbolType.PRIVATE, SymbolType.PROTECTED, SymbolType.OVERRIDE, SymbolType.FINAL, SymbolType.DYNAMIC, SymbolGroup.IDENTIFIER, SymbolType.INTERNAL)) {
                 if (s.type == SymbolType.FINAL) {
                     if (isFinal) {
                         throw new AVM2ParseException("Only one final keyword allowed", lexer.yyline());
@@ -710,6 +710,9 @@ public class ActionScript3Parser {
                             throw new AVM2ParseException("Interface cannot have public, private or protected modifier", lexer.yyline());
                         }
                         break;
+                    case INTERNAL:
+                        namespace = packageInternalNs;
+                        break;
                 }
                 s = lex();
             }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/types/Namespace.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/types/Namespace.java
index 3c3227c30..a1fdafe50 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/types/Namespace.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/abc/types/Namespace.java
@@ -45,7 +45,7 @@ public class Namespace {
 
     public static final String[] nameSpaceKindNames = new String[]{"Namespace", "PrivateNamespace", "PackageNamespace", "PackageInternalNs", "ProtectedNamespace", "ExplicitNamespace", "StaticProtectedNs"};
 
-    public static final String[] namePrefixes = new String[]{"", "private", "public", "", "protected", "explicit", "protected"};
+    public static final String[] namePrefixes = new String[]{"", "private", "public", "internal", "protected", "explicit", "protected"};
 
     public int kind;
 
diff --git a/libsrc/ffdec_lib/testdata/as3_new/bin/as3_new.air.swf b/libsrc/ffdec_lib/testdata/as3_new/bin/as3_new.air.swf
index 0eb6eb5e2..274a66e03 100644
Binary files a/libsrc/ffdec_lib/testdata/as3_new/bin/as3_new.air.swf and b/libsrc/ffdec_lib/testdata/as3_new/bin/as3_new.air.swf differ
diff --git a/libsrc/ffdec_lib/testdata/as3_new/bin/as3_new.flex.swf b/libsrc/ffdec_lib/testdata/as3_new/bin/as3_new.flex.swf
index 4fe4fb637..17cb11b24 100644
Binary files a/libsrc/ffdec_lib/testdata/as3_new/bin/as3_new.flex.swf and b/libsrc/ffdec_lib/testdata/as3_new/bin/as3_new.flex.swf differ
diff --git a/libsrc/ffdec_lib/testdata/as3_new/src/Main.as b/libsrc/ffdec_lib/testdata/as3_new/src/Main.as
index 3e79dcbf0..03ba395f2 100644
--- a/libsrc/ffdec_lib/testdata/as3_new/src/Main.as
+++ b/libsrc/ffdec_lib/testdata/as3_new/src/Main.as
@@ -127,6 +127,8 @@ package
 		
 		TestPropertyCoerce;
 		TestUnaryMinus;
+        
+        TestModifiers;
 		
 		public function Main()
 		{
diff --git a/libsrc/ffdec_lib/testdata/as3_new/src/tests_classes/TestModifiers.as b/libsrc/ffdec_lib/testdata/as3_new/src/tests_classes/TestModifiers.as
new file mode 100644
index 000000000..8399c968e
--- /dev/null
+++ b/libsrc/ffdec_lib/testdata/as3_new/src/tests_classes/TestModifiers.as
@@ -0,0 +1,48 @@
+package tests_classes
+{
+	
+	public class TestModifiers
+	{
+        private var attr_inst_private:int = 1;
+        public var attr_inst_public:int = 2;
+        internal var attr_inst_internal:int = 3;
+        protected var attr_inst_protected:int = 4;
+        
+        explicit var attr_exp:int = 9;
+        
+        private static var attr_stat_private:int = 5;
+        public static var attr_stat_public:int = 6;
+        internal static var attr_stat_internal:int = 7;
+        protected static var attr_stat_protected:int = 8;
+        
+        private function func_inst_private():int {
+            return 1;
+        }        
+        public function func_inst_public():int {
+            return 2;
+        }        
+        internal function func_inst_internal():int {
+            return 3;
+        }                
+        protected function func_inst_protected():int {
+            return 4;            
+        }
+        
+        private static function func_stat_private():int {
+            return 5;
+        }
+        public static function func_stat_public():int {
+            return 6;
+        }
+        internal static function func_stat_internal():int {
+            return 7;
+        }
+        protected static function func_stat_protected():int {
+            return 8;            
+        }
+        
+        
+        
+        
+	}
+}