diff --git a/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/psiutils/CodeBlockSurrounder.java b/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/psiutils/CodeBlockSurrounder.java
index a69cbfaf3b56..2b11fe90e90b 100644
--- a/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/psiutils/CodeBlockSurrounder.java
+++ b/plugins/InspectionGadgets/InspectionGadgetsAnalysis/src/com/siyeh/ig/psiutils/CodeBlockSurrounder.java
@@ -176,14 +176,14 @@ public abstract class CodeBlockSurrounder {
           if (conditionParent instanceof PsiWhileStatement) {
             return new WhileConditionSurrounder(expression, (PsiWhileStatement)conditionParent);
           }
-          CodeBlockSurrounder parentSurrounder = forExpression(polyadicExpression);
+          CodeBlockSurrounder parentSurrounder = forExpressionSkipParentheses(polyadicExpression);
           if (parentSurrounder == null) return null;
           ParentContext parentContext = parentSurrounder.getExpectedParentContext();
           if (parentContext != ParentContext.RETURN && parentContext != ParentContext.SIMPLE_IF_CONDITION) return null;
           return new AndOrToIfSurrounder(expression, polyadicExpression, parentSurrounder);
         }
         else if (type.equals(JavaTokenType.OROR) && polyadicExpression.getOperands()[0] != cur) {
-          CodeBlockSurrounder parentSurrounder = forExpression(polyadicExpression);
+          CodeBlockSurrounder parentSurrounder = forExpressionSkipParentheses(polyadicExpression);
           if (parentSurrounder == null) return null;
           ParentContext parentContext = parentSurrounder.getExpectedParentContext();
           if (parentContext != ParentContext.RETURN) return null;
@@ -191,7 +191,7 @@ public abstract class CodeBlockSurrounder {
         }
       }
       if (parent instanceof PsiConditionalExpression && ((PsiConditionalExpression)parent).getCondition() != cur) {
-        CodeBlockSurrounder parentSurrounder = forExpression((PsiConditionalExpression)parent);
+        CodeBlockSurrounder parentSurrounder = forExpressionSkipParentheses((PsiConditionalExpression)parent);
         if (parentSurrounder == null) return null;
         ParentContext parentContext = parentSurrounder.getExpectedParentContext();
         if (parentContext != ParentContext.ASSIGNMENT && parentContext != ParentContext.RETURN) return null;
@@ -253,6 +253,13 @@ public abstract class CodeBlockSurrounder {
     return null;
   }
 
+  private static @Nullable CodeBlockSurrounder forExpressionSkipParentheses(PsiExpression expression) {
+    while (expression.getParent() instanceof PsiParenthesizedExpression) {
+      expression = (PsiExpression)expression.getParent();
+    }
+    return forExpression(expression);
+  }
+
   private static boolean hasNameCollision(PsiElement declaration, PsiElement context) {
     if (declaration instanceof PsiDeclarationStatement) {
       PsiResolveHelper helper = JavaPsiFacade.getInstance(context.getProject()).getResolveHelper();
@@ -543,7 +550,8 @@ public abstract class CodeBlockSurrounder {
     @NotNull PsiStatement replace(@NotNull Project project, @NotNull PsiElementFactory factory) {
       boolean then = PsiTreeUtil.isAncestor(myConditional.getThenExpression(), myExpression, false);
       SurroundResult upstreamResult = myUpstream.surround();
-      PsiConditionalExpression ternary = (PsiConditionalExpression)upstreamResult.getExpression();
+      PsiConditionalExpression ternary = Objects.requireNonNull(
+        (PsiConditionalExpression)PsiUtil.skipParenthesizedExprDown(upstreamResult.getExpression()));
       PsiElement parent = PsiUtil.skipParenthesizedExprUp(ternary.getParent());
       PsiStatement statement = upstreamResult.getAnchor();
       if (parent instanceof PsiLocalVariable) {
@@ -610,7 +618,8 @@ public abstract class CodeBlockSurrounder {
       int index = (int)StreamEx.of(operands).indexOf(o -> PsiTreeUtil.isAncestor(o, myExpression, false))
         .orElseThrow(IllegalStateException::new);
       SurroundResult upstreamResult = myUpstream.surround();
-      PsiPolyadicExpression polyadicExpression = (PsiPolyadicExpression)upstreamResult.getExpression();
+      PsiPolyadicExpression polyadicExpression =
+        (PsiPolyadicExpression)Objects.requireNonNull(PsiUtil.skipParenthesizedExprDown(upstreamResult.getExpression()));
       PsiStatement statement = upstreamResult.getAnchor();
       PsiExpression operand = polyadicExpression.getOperands()[index];
       PsiExpression lOperands = SplitConditionUtil.getLOperands(polyadicExpression, Objects.requireNonNull(
diff --git a/plugins/IntentionPowerPak/test/com/siyeh/ipp/collections/to_mutable_collection/InsideTernary.java b/plugins/IntentionPowerPak/test/com/siyeh/ipp/collections/to_mutable_collection/InsideTernary.java
new file mode 100644
index 000000000000..15a5bb11fc68
--- /dev/null
+++ b/plugins/IntentionPowerPak/test/com/siyeh/ipp/collections/to_mutable_collection/InsideTernary.java
@@ -0,0 +1,8 @@
+import java.util.*;
+
+class Test {
+
+  List<String> getList(int x) {
+    return (x == 0 ? Collections.<caret>singletonList("0") : Collections.emptyList());
+  }
+}
\ No newline at end of file
diff --git a/plugins/IntentionPowerPak/test/com/siyeh/ipp/collections/to_mutable_collection/InsideTernary_after.java b/plugins/IntentionPowerPak/test/com/siyeh/ipp/collections/to_mutable_collection/InsideTernary_after.java
new file mode 100644
index 000000000000..a3032f6033a3
--- /dev/null
+++ b/plugins/IntentionPowerPak/test/com/siyeh/ipp/collections/to_mutable_collection/InsideTernary_after.java
@@ -0,0 +1,14 @@
+import java.util.*;
+
+class Test {
+
+  List<String> getList(int x) {
+      if (x == 0) {
+          List<String> <caret>strings = new ArrayList<>();
+          strings.add("0");
+          return (strings);
+      } else {
+          return (Collections.emptyList());
+      }
+  }
+}
\ No newline at end of file
diff --git a/plugins/IntentionPowerPak/testSrc/com/siyeh/ipp/collections/ReplaceWithMutableCollectionIntentionTest.java b/plugins/IntentionPowerPak/testSrc/com/siyeh/ipp/collections/ReplaceWithMutableCollectionIntentionTest.java
index 211ffc9a6333..05f9598f711b 100644
--- a/plugins/IntentionPowerPak/testSrc/com/siyeh/ipp/collections/ReplaceWithMutableCollectionIntentionTest.java
+++ b/plugins/IntentionPowerPak/testSrc/com/siyeh/ipp/collections/ReplaceWithMutableCollectionIntentionTest.java
@@ -65,6 +65,7 @@ public class ReplaceWithMutableCollectionIntentionTest extends IPPTestCase {
   public void testImmutableListAssignment() { assertIntentionNotAvailable(); }
   public void testImmutableSetVarArgArray() { doTest(); }
   public void testImmutableSetVarArgTernary() { doTest(); }
+  public void testInsideTernary() { doTest(); }
 
   @Override
   protected String getIntentionName() {