diff --git a/src/main/java/de/neemann/digital/core/flipflops/FlipflopRSAsync.java b/src/main/java/de/neemann/digital/core/flipflops/FlipflopRSAsync.java
index fb6959d59..19d6e697a 100644
--- a/src/main/java/de/neemann/digital/core/flipflops/FlipflopRSAsync.java
+++ b/src/main/java/de/neemann/digital/core/flipflops/FlipflopRSAsync.java
@@ -61,8 +61,8 @@ public class FlipflopRSAsync extends FlipflopBit {
 
         if (s) {
             if (r) {
-                q = true;
-                qn = true;
+                q = false;
+                qn = false;
             } else {
                 q = true;
                 qn = false;
@@ -72,11 +72,11 @@ public class FlipflopRSAsync extends FlipflopBit {
                 q = false;
                 qn = true;
             } else {
-                if (q && qn) {
+                if (!q && !qn) {
                     if (Math.random() < 0.5) {
-                        q = false;
+                        q = true;
                     } else {
-                        qn = false;
+                        qn = true;
                     }
                 }
             }
diff --git a/src/test/java/de/neemann/digital/core/flipflops/FlipflopRSAsyncTest.java b/src/test/java/de/neemann/digital/core/flipflops/FlipflopRSAsyncTest.java
index 5fa8003a9..fa86f29f3 100644
--- a/src/test/java/de/neemann/digital/core/flipflops/FlipflopRSAsyncTest.java
+++ b/src/test/java/de/neemann/digital/core/flipflops/FlipflopRSAsyncTest.java
@@ -29,9 +29,9 @@ public class FlipflopRSAsyncTest extends TestCase {
         sc.check(0, 0, 1, 0);
         sc.check(0, 1, 0, 1);
         sc.check(0, 0, 0, 1);
-        sc.check(1, 1, 1, 1);
+        sc.check(1, 1, 0, 0);
         sc.check(1, 0, 1, 0);
-        sc.check(1, 1, 1, 1);
+        sc.check(1, 1, 0, 0);
         sc.check(0, 1, 0, 1);
 
         ObservableValue q = out.getOutputs().get(0);
@@ -41,8 +41,8 @@ public class FlipflopRSAsyncTest extends TestCase {
             s.setValue(1);
             r.setValue(1);
             model.doStep();
-            assertTrue(q.getBool());
-            assertTrue(qn.getBool());
+            assertFalse(q.getBool());
+            assertFalse(qn.getBool());
             s.setValue(0);
             r.setValue(0);
             model.doStep();