diff --git a/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightMethodUtil.java b/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightMethodUtil.java
index ce17f7b3a82e..3fd204a4fba1 100644
--- a/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightMethodUtil.java
+++ b/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightMethodUtil.java
@@ -1734,6 +1734,22 @@ public final class HighlightMethodUtil {
     return false;
   }
 
+  static HighlightInfo.@Nullable Builder checkConstructorInImplicitClass(@NotNull PsiMethod method) {
+    if (!method.isConstructor()) {
+      return null;
+    }
+    if (!(method.getContainingClass() instanceof PsiImplicitClass)) {
+      return null;
+    }
+    String description = JavaErrorBundle.message("implicit.class.with.explicit.constructor");
+    TextRange textRange = HighlightNamesUtil.getMethodDeclarationTextRange(method);
+    HighlightInfo.Builder builder =
+      HighlightInfo.newHighlightInfo(HighlightInfoType.ERROR).range(textRange).descriptionAndTooltip(description);
+    IntentionAction action = QuickFixFactory.getInstance().createDeleteFix(method);
+    builder.registerFix(action, null, null, null, null);
+    return builder;
+  }
+
   private static final class ReturnModel {
     final PsiReturnStatement myStatement;
     final PsiType myType;
diff --git a/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightVisitorImpl.java b/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightVisitorImpl.java
index 2b68d606536b..6da3aab19f30 100644
--- a/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightVisitorImpl.java
+++ b/java/java-analysis-impl/src/com/intellij/codeInsight/daemon/impl/analysis/HighlightVisitorImpl.java
@@ -776,6 +776,7 @@ public class HighlightVisitorImpl extends JavaElementVisitor implements Highligh
   @Override
   public void visitMethod(@NotNull PsiMethod method) {
     super.visitMethod(method);
+    if (!hasErrorResults()) add(HighlightMethodUtil.checkConstructorInImplicitClass(method));
     if (!hasErrorResults()) add(HighlightControlFlowUtil.checkUnreachableStatement(method.getBody()));
     if (!hasErrorResults()) add(HighlightMethodUtil.checkConstructorHandleSuperClassExceptions(method));
     if (!hasErrorResults()) add(HighlightMethodUtil.checkRecordAccessorDeclaration(method));
diff --git a/java/java-psi-impl/resources/messages/JavaErrorBundle.properties b/java/java-psi-impl/resources/messages/JavaErrorBundle.properties
index e6b675faa7bb..ed11e07f618d 100644
--- a/java/java-psi-impl/resources/messages/JavaErrorBundle.properties
+++ b/java/java-psi-impl/resources/messages/JavaErrorBundle.properties
@@ -451,4 +451,5 @@ too.many.array.dimensions=Too many array dimensions
 error.cannot.infer.pattern.type=Cannot infer pattern type: {0}
 error.extra.semicolons.between.import.statements.not.allowed=Extra semicolons between import statements are not allowed
 remove.unused.imports.quickfix.text=Remove unused imports
-incomplete.project.state.pending.reference=Not resolved until the project is fully loaded
\ No newline at end of file
+incomplete.project.state.pending.reference=Not resolved until the project is fully loaded
+implicit.class.with.explicit.constructor=Explicit constructor in implicitly declared class is not allowed
\ No newline at end of file
diff --git a/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/implicitClass/ImplicitClassConstructorNoParam.java b/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/implicitClass/ImplicitClassConstructorNoParam.java
new file mode 100644
index 000000000000..05897f719a62
--- /dev/null
+++ b/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/implicitClass/ImplicitClassConstructorNoParam.java
@@ -0,0 +1,7 @@
+void main(String[] args) {
+  System.out.println("AAAAA");
+}
+
+<error descr="Explicit constructor in implicitly declared class is not allowed">public ImplicitClassConstructorNoParam()</error> {
+  System.out.println("BBBBB");
+}
\ No newline at end of file
diff --git a/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/implicitClass/ImplicitClassConstructorParam.java b/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/implicitClass/ImplicitClassConstructorParam.java
new file mode 100644
index 000000000000..40dd435ed550
--- /dev/null
+++ b/java/java-tests/testData/codeInsight/daemonCodeAnalyzer/implicitClass/ImplicitClassConstructorParam.java
@@ -0,0 +1,7 @@
+void main(String[] args) {
+  System.out.println("AAAAA");
+}
+
+<error descr="Explicit constructor in implicitly declared class is not allowed">public ImplicitClassConstructorParam(String a)</error> {
+  System.out.println("BBBBB");
+}
\ No newline at end of file
diff --git a/java/java-tests/testSrc/com/intellij/java/codeInsight/daemon/ImplicitClassHighlightingTest.kt b/java/java-tests/testSrc/com/intellij/java/codeInsight/daemon/ImplicitClassHighlightingTest.kt
index 00057ae46f71..49bba34d7f8e 100644
--- a/java/java-tests/testSrc/com/intellij/java/codeInsight/daemon/ImplicitClassHighlightingTest.kt
+++ b/java/java-tests/testSrc/com/intellij/java/codeInsight/daemon/ImplicitClassHighlightingTest.kt
@@ -164,6 +164,14 @@ class ImplicitClassHighlightingTest : LightJavaCodeInsightFixtureTestCase() {
     })
   }
 
+  fun testImplicitClassConstructorNoParam() {
+    doTest()
+  }
+
+  fun testImplicitClassConstructorParam() {
+    doTest()
+  }
+
   private fun doTest() {
     myFixture.configureByFile(getTestName(false) + ".java")
     myFixture.checkHighlighting()