diff --git a/src/API/lms7_device.cpp b/src/API/lms7_device.cpp
index 2ea9f945a..05680e016 100644
--- a/src/API/lms7_device.cpp
+++ b/src/API/lms7_device.cpp
@@ -1656,9 +1656,14 @@ int LMS7_Device::LoadConfig(const char *filename, int ind)
     if (lms->LoadConfig(filename)==0)
     {
         //tune PLLs as saved VCO settings may not work
-        lms->SetFrequencySX(false, lms->GetFrequencySX(false));
-        lms->SetFrequencySX(true, lms->GetFrequencySX(true));
-        lms->TuneVCO(lime::LMS7002M::VCO_CGEN);
+        lms->Modify_SPI_Reg_bits(LMS7param(MAC), 1);
+        if (!lms->Get_SPI_Reg_bits(LMS7param(PD_VCO)))
+            lms->SetFrequencySX(false, lms->GetFrequencySX(false));
+        lms->Modify_SPI_Reg_bits(LMS7param(MAC), 2);
+        if (!lms->Get_SPI_Reg_bits(LMS7param(PD_VCO)))
+            lms->SetFrequencySX(true, lms->GetFrequencySX(true));
+        if (!lms->Get_SPI_Reg_bits(LMS7param(PD_VCO_CGEN)))
+            lms->TuneVCO(lime::LMS7002M::VCO_CGEN);
         lms->Modify_SPI_Reg_bits(LMS7param(MAC),1,true);
         return SetFPGAInterfaceFreq(-1, -1, -1000, -1000);
     }