diff --git a/src/jdk.compiler/share/classes/com/sun/tools/javac/parser/JavacParser.java b/src/jdk.compiler/share/classes/com/sun/tools/javac/parser/JavacParser.java
index d83fb85b7f2..9b3be5c5e00 100644
--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/parser/JavacParser.java
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/parser/JavacParser.java
@@ -3921,6 +3921,7 @@ public JCTree.JCCompilationUnit parseCompilationUnit() {
 
         boolean firstTypeDecl = true;   // have we seen a class, enum, or interface declaration yet?
         boolean isImplicitClass = false;
+        boolean canBeImplicitClass = true;
         OUTER: while (token.kind != EOF) {
             if (token.pos <= endPosTable.errorEndPos) {
                 // error recovery
@@ -3989,7 +3990,7 @@ public JCTree.JCCompilationUnit parseCompilationUnit() {
                 // it is parsed. Otherwise, parsing continues as though
                 // implicitly declared classes did not exist and error reporting
                 // is the same as in the past.
-                if (Feature.IMPLICIT_CLASSES.allowedInSource(source) && !isDeclaration()) {
+                if (canBeImplicitClass && Feature.IMPLICIT_CLASSES.allowedInSource(source) && !isDeclaration()) {
                     final JCModifiers finalMods = mods;
                     JavacParser speculative = new VirtualParser(this);
                     List<JCTree> speculativeResult =
@@ -4005,6 +4006,7 @@ public JCTree.JCCompilationUnit parseCompilationUnit() {
                     defs.appendList(topLevelMethodOrFieldDeclaration(mods, docComment));
                     isImplicitClass = true;
                 } else {
+                    canBeImplicitClass = false;
                     JCTree def = typeDeclaration(mods, docComment);
                     if (def instanceof JCExpressionStatement statement)
                         def = statement.expr;