diff --git a/src/Psalm/Internal/Analyzer/Statements/Expression/AssertionFinder.php b/src/Psalm/Internal/Analyzer/Statements/Expression/AssertionFinder.php
index a8a426afe..fbfc33717 100644
--- a/src/Psalm/Internal/Analyzer/Statements/Expression/AssertionFinder.php
+++ b/src/Psalm/Internal/Analyzer/Statements/Expression/AssertionFinder.php
@@ -511,7 +511,7 @@ class AssertionFinder
     ) {
         $if_types = [];
 
-        $null_position = self::hasNullVariable($conditional);
+        $null_position = self::hasNullVariable($conditional, $source);
         $false_position = self::hasFalseVariable($conditional);
         $true_position = self::hasTrueVariable($conditional);
         $empty_array_position = self::hasEmptyArrayVariable($conditional);
@@ -1147,7 +1147,7 @@ class AssertionFinder
     ) {
         $if_types = [];
 
-        $null_position = self::hasNullVariable($conditional);
+        $null_position = self::hasNullVariable($conditional, $sourcec);
         $false_position = self::hasFalseVariable($conditional);
         $true_position = self::hasTrueVariable($conditional);
         $empty_array_position = self::hasEmptyArrayVariable($conditional);
@@ -2439,8 +2439,10 @@ class AssertionFinder
      *
      * @return  int|null
      */
-    protected static function hasNullVariable(PhpParser\Node\Expr\BinaryOp $conditional)
-    {
+    protected static function hasNullVariable(
+        PhpParser\Node\Expr\BinaryOp $conditional,
+        FileSource $source
+    ) {
         if ($conditional->right instanceof PhpParser\Node\Expr\ConstFetch
             && strtolower($conditional->right->name->parts[0]) === 'null'
         ) {
@@ -2453,6 +2455,13 @@ class AssertionFinder
             return self::ASSIGNMENT_TO_LEFT;
         }
 
+        if ($source instanceof StatementsAnalyzer
+            && ($right_type = $source->node_data->getType($conditional->right))
+            && $right_type->isNull()
+        ) {
+            return self::ASSIGNMENT_TO_RIGHT;
+        }
+
         return null;
     }
 
diff --git a/tests/TypeReconciliation/ValueTest.php b/tests/TypeReconciliation/ValueTest.php
index 4682aefe2..bb65bf75a 100644
--- a/tests/TypeReconciliation/ValueTest.php
+++ b/tests/TypeReconciliation/ValueTest.php
@@ -736,6 +736,26 @@ class ValueTest extends \Psalm\Tests\TestCase
                     }
                     if ($data["e"] > 0) {}'
             ],
+            'compareToNullImplicitly' => [
+                '<?php
+                    final class Foo {
+                        public const VALUE_ANY = null;
+                        public const VALUE_ONE = "one";
+
+                        /** @return self::VALUE_* */
+                        public static function getValues() {
+                            return rand(0, 1) ? null : self::VALUE_ONE;
+                        }
+                    }
+
+                    $data = Foo::getValues();
+
+                    if ($data === Foo::VALUE_ANY) {
+                        $data = "default";
+                    }
+
+                    echo strlen($data);'
+            ],
         ];
     }