diff --git a/src/Php/CompilerBase.php b/src/Php/CompilerBase.php
index 5b164d95..c6a1bcce 100644
--- a/src/Php/CompilerBase.php
+++ b/src/Php/CompilerBase.php
@@ -390,6 +390,8 @@ class CompilerBase extends \PhpAot\Core\Translator
                 return $this->parseAssignOpShiftRight($expr);
             case 'Expr_AssignOp_BitwiseAnd':
                 return $this->parseAssignOpBitwiseAnd($expr);
+            case 'Expr_AssignOp_BitwiseOr':
+                return $this->parseAssignOpBitwiseOr($expr);
             case 'Expr_AssignOp_BitwiseXor':
                 return $this->parseAssignOpBitwiseXor($expr);
             case 'Expr_AssignOp_Pow':
@@ -2235,6 +2237,11 @@ class CompilerBase extends \PhpAot\Core\Translator
         return $this->parseAssignOp($expr, '&=');
     }
 
+    private function parseAssignOpBitwiseOr(Expr\AssignOp\BitwiseOr $expr): string
+    {
+        return $this->parseAssignOp($expr, '|=');
+    }
+
     protected function parseAssignOpPow(Expr\AssignOp\Pow $expr): string
     {
         return $this->parseAssignOp($expr, '**=');
diff --git a/tests/aot/operator/assignop_bitwiseor.phpt b/tests/aot/operator/assignop_bitwiseor.phpt
new file mode 100644
index 00000000..c6faa284
--- /dev/null
+++ b/tests/aot/operator/assignop_bitwiseor.phpt
@@ -0,0 +1,13 @@
+--TEST--
+Operator: AssignOp BitwiseOr
+--FILE--
+<?php
+function main()
+{
+    $a =  100;
+    $a |= 16;
+    var_dump($a);
+}
+?>
+--EXPECT--
+int(116)