diff --git a/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/inliner/StreamChainInliner.java b/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/inliner/StreamChainInliner.java
index aa52bc6465a1..6e6031e420ee 100644
--- a/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/inliner/StreamChainInliner.java
+++ b/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/inliner/StreamChainInliner.java
@@ -754,8 +754,10 @@ public class StreamChainInliner implements CallInliner {
       // exactly single element
       PsiExpression arg = sourceCall.getArgumentList().getExpressions()[0];
       builder
+        .pushForWrite(builder.createTempVariable(inType))
         .pushExpression(arg)
         .boxUnbox(arg, inType)
+        .assign()
         .chain(firstStep::before)
         .chain(firstStep::iteration);
       return;
diff --git a/java/java-tests/testData/inspection/optionalGet/OptionalGet.java b/java/java-tests/testData/inspection/optionalGet/OptionalGet.java
index 8bdc4b9166b7..bfb2c84454b2 100644
--- a/java/java-tests/testData/inspection/optionalGet/OptionalGet.java
+++ b/java/java-tests/testData/inspection/optionalGet/OptionalGet.java
@@ -429,4 +429,19 @@ class FinallyTest
       System.out.println(a.getAsInt());
     }
   }
+
+  class X {
+    private String value;
+    public Optional<String> getValue() {
+      return Optional.ofNullable(value);
+    }
+  }
+
+  void testStream() {
+    // IDEA-208770
+    Stream.of(new X(), new X()).filter(x -> x.getValue().isPresent()).map(x -> x.getValue().get());
+    Stream.of(new X()).filter(x -> x.getValue().isPresent()).map(x -> x.getValue().get());
+    X xx = new X();
+    Stream.of(xx).filter(x -> x.getValue().isPresent()).map(x -> x.getValue().get());
+  }
 }
\ No newline at end of file