diff --git a/plugins/samplesink/bladerfoutput/bladerfoutput.cpp b/plugins/samplesink/bladerfoutput/bladerfoutput.cpp
index 3fe3fb421..100a1e0e4 100644
--- a/plugins/samplesink/bladerfoutput/bladerfoutput.cpp
+++ b/plugins/samplesink/bladerfoutput/bladerfoutput.cpp
@@ -142,6 +142,10 @@ void BladerfOutput::closeDevice()
 {
     int res;
 
+    if (m_dev == 0) { // was never open
+        return;
+    }
+
     if ((res = bladerf_enable_module(m_dev, BLADERF_MODULE_TX, false)) < 0)
     {
         qCritical("BladerfOutput::closeDevice: bladerf_enable_module with return code %d", res);
diff --git a/plugins/samplesource/bladerfinput/bladerfinput.cpp b/plugins/samplesource/bladerfinput/bladerfinput.cpp
index 83360eb03..c6b2c033e 100644
--- a/plugins/samplesource/bladerfinput/bladerfinput.cpp
+++ b/plugins/samplesource/bladerfinput/bladerfinput.cpp
@@ -146,6 +146,10 @@ void BladerfInput::closeDevice()
 {
     int res;
 
+    if (m_dev == 0) { // was never open
+        return;
+    }
+
     if ((res = bladerf_enable_module(m_dev, BLADERF_MODULE_RX, false)) < 0)
     {
         qCritical("BladerfInput::stop: bladerf_enable_module with return code %d", res);
diff --git a/plugins/samplesource/fcdpro/fcdproinput.cpp b/plugins/samplesource/fcdpro/fcdproinput.cpp
index a585e92d2..e3b2f96e5 100644
--- a/plugins/samplesource/fcdpro/fcdproinput.cpp
+++ b/plugins/samplesource/fcdpro/fcdproinput.cpp
@@ -117,6 +117,10 @@ bool FCDProInput::start()
 
 void FCDProInput::closeDevice()
 {
+    if (m_dev == 0) { // was never open
+        return;
+    }
+
     fcdClose(m_dev);
     m_dev = 0;
 }
diff --git a/plugins/samplesource/fcdproplus/fcdproplusinput.cpp b/plugins/samplesource/fcdproplus/fcdproplusinput.cpp
index 7d63c2be8..20657679e 100644
--- a/plugins/samplesource/fcdproplus/fcdproplusinput.cpp
+++ b/plugins/samplesource/fcdproplus/fcdproplusinput.cpp
@@ -111,6 +111,10 @@ bool FCDProPlusInput::start()
 
 void FCDProPlusInput::closeDevice()
 {
+    if (m_dev == 0) { // was never open
+        return;
+    }
+
     fcdClose(m_dev);
     m_dev = 0;
 }
diff --git a/plugins/samplesource/limesdrinput/limesdrinput.cpp b/plugins/samplesource/limesdrinput/limesdrinput.cpp
index f06d0d137..49127d370 100644
--- a/plugins/samplesource/limesdrinput/limesdrinput.cpp
+++ b/plugins/samplesource/limesdrinput/limesdrinput.cpp
@@ -133,6 +133,10 @@ bool LimeSDRInput::openDevice()
 
 void LimeSDRInput::closeDevice()
 {
+    if (m_deviceShared.m_deviceParams->getDevice() == 0) { // was never open
+        return;
+    }
+
     // release the channel
 
     if (LMS_EnableChannel(m_deviceShared.m_deviceParams->getDevice(), LMS_CH_RX, m_deviceShared.m_channel, false) != 0)