diff --git a/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/CFGBuilder.java b/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/CFGBuilder.java
index 8a2cac28af70..17456a2ea826 100644
--- a/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/CFGBuilder.java
+++ b/java/java-analysis-impl/src/com/intellij/codeInspection/dataFlow/CFGBuilder.java
@@ -726,6 +726,7 @@ public class CFGBuilder {
       push(factory.getConstFactory().getSentinel());
       for (PsiExpression expression : expressions) {
         pushExpression(expression);
+        boxUnbox(expression, targetVariable.getVariableType());
       }
       // Revert order
       add(new SpliceInstruction(expressions.length, IntStreamEx.ofIndices(expressions).toArray()));
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 de107041218d..73569a0e08ec 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
@@ -712,8 +712,10 @@ public class StreamChainInliner implements CallInliner {
     }
     if (single) {
       // exactly single element
+      PsiExpression arg = sourceCall.getArgumentList().getExpressions()[0];
       builder
-        .pushExpression(sourceCall.getArgumentList().getExpressions()[0])
+        .pushExpression(arg)
+        .boxUnbox(arg, inType)
         .chain(firstStep::before)
         .chain(firstStep::iteration);
       return;
diff --git a/java/java-tests/testData/inspection/dataFlow/fixture/StreamInlining.java b/java/java-tests/testData/inspection/dataFlow/fixture/StreamInlining.java
index 12f61c7c0f70..5fa6afb5f8d8 100644
--- a/java/java-tests/testData/inspection/dataFlow/fixture/StreamInlining.java
+++ b/java/java-tests/testData/inspection/dataFlow/fixture/StreamInlining.java
@@ -238,4 +238,16 @@ public class StreamInlining {
   void testToArray(List<String> list) {
     list.stream().toArray(size -> <warning descr="Function may return null, but it's not allowed here">null</warning>);
   }
+
+  Object testBoxingExplicit() {
+    return String.join("\n",
+                Stream.of(12, 22)
+                  .map(Object::toString)
+                  .collect(Collectors.toList())
+    );
+  }
+
+  public static void testBoxingExplicit2() {
+    double s = Stream.of(1).mapToDouble(x -> x * x).sum();
+  }
 }