diff --git a/src/detection/camera/camera_windows.cpp b/src/detection/camera/camera_windows.cpp
index fb7a653ea..48ee9dc45 100644
--- a/src/detection/camera/camera_windows.cpp
+++ b/src/detection/camera/camera_windows.cpp
@@ -72,13 +72,13 @@ extern "C" const char* ffDetectCamera(FF_A_UNUSED FFlist* result) {
             continue;
         }
 
-        IMFStreamDescriptor* FF_AUTO_RELEASE_COM_OBJECT sd = NULL;
+        IMFStreamDescriptor* FF_AUTO_RELEASE_COM_OBJECT sd = nullptr;
         BOOL selected;
         if (FAILED(pd->GetStreamDescriptorByIndex(0, &selected, &sd))) {
             continue;
         }
 
-        IMFMediaTypeHandler* FF_AUTO_RELEASE_COM_OBJECT handler = NULL;
+        IMFMediaTypeHandler* FF_AUTO_RELEASE_COM_OBJECT handler = nullptr;
         if (FAILED(sd->GetMediaTypeHandler(&handler))) {
             continue;
         }
diff --git a/src/detection/sound/sound_windows.cpp b/src/detection/sound/sound_windows.cpp
index c770f5c97..835eb63a2 100644
--- a/src/detection/sound/sound_windows.cpp
+++ b/src/detection/sound/sound_windows.cpp
@@ -25,7 +25,7 @@ static const char* detectSoundDevice(FFlist* devices /* List of FFSoundDevice */
         return "immDevice->GetId() failed";
     }
 
-    IPropertyStore* FF_AUTO_RELEASE_COM_OBJECT immPropStore;
+    IPropertyStore* FF_AUTO_RELEASE_COM_OBJECT immPropStore = NULL;
     if (FAILED(immDevice->OpenPropertyStore(STGM_READ, &immPropStore))) {
         return "immDevice->OpenPropertyStore() failed";
     }
@@ -54,7 +54,7 @@ static const char* detectSoundDevice(FFlist* devices /* List of FFSoundDevice */
         }
     }
 
-    IAudioEndpointVolume* FF_AUTO_RELEASE_COM_OBJECT immEndpointVolume;
+    IAudioEndpointVolume* FF_AUTO_RELEASE_COM_OBJECT immEndpointVolume = NULL;
     if (SUCCEEDED(immDevice->Activate(IID_IAudioEndpointVolume, CLSCTX_ALL, NULL, (void**) &immEndpointVolume))) {
         BOOL muted;
         if (FAILED(immEndpointVolume->GetMute(&muted)) || !muted) {