diff --git a/src/libraries/System.Text.RegularExpressions/gen/RegexGenerator.Emitter.cs b/src/libraries/System.Text.RegularExpressions/gen/RegexGenerator.Emitter.cs
index 1fb6aaf78f3fb6..69b3c1a6c9d47f 100644
--- a/src/libraries/System.Text.RegularExpressions/gen/RegexGenerator.Emitter.cs
+++ b/src/libraries/System.Text.RegularExpressions/gen/RegexGenerator.Emitter.cs
@@ -1106,6 +1106,7 @@ bool EmitAnchors()
                                 noMatchFoundLabelNeeded = true;
                                 Goto(NoMatchFound);
                             }
+                            writer.WriteLine("base.runtextpos = pos;");
                         }
                         writer.WriteLine();
                         break;
diff --git a/src/libraries/System.Text.RegularExpressions/src/System/Text/RegularExpressions/RegexCompiler.cs b/src/libraries/System.Text.RegularExpressions/src/System/Text/RegularExpressions/RegexCompiler.cs
index 529e9d37e43033..432c60689d8cf7 100644
--- a/src/libraries/System.Text.RegularExpressions/src/System/Text/RegularExpressions/RegexCompiler.cs
+++ b/src/libraries/System.Text.RegularExpressions/src/System/Text/RegularExpressions/RegexCompiler.cs
@@ -736,6 +736,11 @@ bool EmitAnchors()
                                     }
                                     Ldloc(pos);
                                     BltFar(returnFalse);
+
+                                    // base.runtextpos = pos;
+                                    Ldthis();
+                                    Ldloc(pos);
+                                    Stfld(RuntextposField);
                                 }
 
                                 MarkLabel(label);