diff --git a/slsDetectorServers/jungfrauDetectorServer/bin/jungfrauDetectorServer_developer b/slsDetectorServers/jungfrauDetectorServer/bin/jungfrauDetectorServer_developer
index 38f44330b..8628212f5 100755
Binary files a/slsDetectorServers/jungfrauDetectorServer/bin/jungfrauDetectorServer_developer and b/slsDetectorServers/jungfrauDetectorServer/bin/jungfrauDetectorServer_developer differ
diff --git a/slsDetectorServers/jungfrauDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/jungfrauDetectorServer/slsDetectorFunctionList.c
index 7617034ed..57f96cc18 100644
--- a/slsDetectorServers/jungfrauDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/jungfrauDetectorServer/slsDetectorFunctionList.c
@@ -285,6 +285,9 @@ u_int16_t getHardwareSerialNumber() {
 
 // is board 1.0?, with value 2 (resistor network)
 int isHardwareVersion2() {
+#ifdef VIRTUAL
+    return 0;
+#endif
     return (((bus_r(MOD_SERIAL_NUM_REG) & HARDWARE_VERSION_NUM_MSK) ==
              HARDWARE_VERSION_2_VAL)
                 ? 1
@@ -576,6 +579,13 @@ int readConfigFile() {
             // validations
             chipVersion = version;
             LOG(logINFOBLUE, ("Chip Version: v%.01f\n", chipVersion / 10.0));
+
+            // version 1.1 and HW 1.0 (version reg value = 2) is incompatible
+            if (chipVersion == 11 && isHardwareVersion2()) {
+                strcpy(initErrorMessage,
+                        "Chip version 1.1 (from on-board config file) is incompatible with old board (v1.0). Please update board or correct on-board config file.\n");
+                break;                
+            }
         }
 
         memset(line, 0, LZ);
diff --git a/slsSupportLib/include/sls/versionAPI.h b/slsSupportLib/include/sls/versionAPI.h
index fe025fe37..00187dfe0 100644
--- a/slsSupportLib/include/sls/versionAPI.h
+++ b/slsSupportLib/include/sls/versionAPI.h
@@ -6,7 +6,7 @@
 #define APICTB 0x210727
 #define APIGOTTHARD 0x210727
 #define APIGOTTHARD2 0x210727
-#define APIJUNGFRAU 0x210727
 #define APIMYTHEN3 0x210727
 #define APIMOENCH 0x210727
 #define APIEIGER 0x210727
+#define APIJUNGFRAU 0x210727