diff --git a/reactos/dll/win32/ws2_32_new/src/addrinfo.c b/reactos/dll/win32/ws2_32_new/src/addrinfo.c
index 1ee48fbd849..3d550cc4349 100644
--- a/reactos/dll/win32/ws2_32_new/src/addrinfo.c
+++ b/reactos/dll/win32/ws2_32_new/src/addrinfo.c
@@ -918,7 +918,7 @@ getnameinfo(const struct sockaddr FAR *sa,
     WCHAR ServiceBuffer[17];
     DWORD HostLength = 0, ServLength = 0;
     PWCHAR ServiceString = NULL, HostString = NULL;
-    DPRINT("getaddrinfo: %p, %p, %p, %lx\n", host, serv, sa, salen);
+    DPRINT("getnameinfo: %p, %p, %p, %lx\n", host, serv, sa, salen);
 
     /* Check for WSAStartup */
     if ((ErrorCode = WsQuickProlog()) != ERROR_SUCCESS) return ErrorCode;
diff --git a/reactos/lib/drivers/sound/mmixer/controls.c b/reactos/lib/drivers/sound/mmixer/controls.c
index 886d6a2c73d..e00fca399cd 100644
--- a/reactos/lib/drivers/sound/mmixer/controls.c
+++ b/reactos/lib/drivers/sound/mmixer/controls.c
@@ -1644,7 +1644,7 @@ MMixerSetupFilter(
     IN LPMIXER_DATA MixerData,
     IN PULONG DeviceCount)
 {
-    MIXER_STATUS Status;
+    MIXER_STATUS Status = MM_STATUS_SUCCESS;
     PTOPOLOGY Topology;
     ULONG NodeIndex;
     LPMIXER_INFO MixerInfo = NULL;
diff --git a/reactos/lib/drivers/sound/mmixer/midi.c b/reactos/lib/drivers/sound/mmixer/midi.c
index f922970263a..afe1a22bfd8 100644
--- a/reactos/lib/drivers/sound/mmixer/midi.c
+++ b/reactos/lib/drivers/sound/mmixer/midi.c
@@ -72,7 +72,7 @@ MMixerAddMidiPin(
     MidiInfo->PinId = PinId;
 
     /* sanity check */
-    ASSERT(wcslen(DeviceName) + 1 < MAXPNAMELEN);
+    ASSERT(!DeviceName || (wcslen(DeviceName) + 1 < MAXPNAMELEN));
 
     /* copy device name */
     if (bInput && DeviceName)
diff --git a/reactos/lib/drivers/sound/mmixer/mixer.c b/reactos/lib/drivers/sound/mmixer/mixer.c
index bc9cf071c9a..a9e2944926a 100644
--- a/reactos/lib/drivers/sound/mmixer/mixer.c
+++ b/reactos/lib/drivers/sound/mmixer/mixer.c
@@ -328,7 +328,7 @@ MMixerGetLineControls(
 
     if (MixerLineControls->cbmxctrl != sizeof(MIXERCONTROLW))
     {
-        DPRINT1("Invalid MixerLineControls cbmxctrl passed %lu expected %lu\n", MixerLineControls->cbStruct, sizeof(MIXERLINECONTROLSW));
+        DPRINT1("Invalid MixerLineControls cbmxctrl passed %lu expected %lu\n", MixerLineControls->cbmxctrl, sizeof(MIXERCONTROLW));
         /* invalid parameter */
         return MM_STATUS_INVALID_PARAMETER;
     }
diff --git a/reactos/win32ss/user/user32/misc/desktop.c b/reactos/win32ss/user/user32/misc/desktop.c
index b32c9d5039c..ae10e8c8a8c 100644
--- a/reactos/win32ss/user/user32/misc/desktop.c
+++ b/reactos/win32ss/user/user32/misc/desktop.c
@@ -330,7 +330,10 @@ RealSystemParametersInfoA(UINT uiAction,
           }
 
           Ret = NtUserSystemParametersInfo(SPI_SETDESKWALLPAPER, uiParam, pvParam, fWinIni);
-          RtlFreeUnicodeString(&ustrWallpaper);
+
+          if (pvParam)
+            RtlFreeUnicodeString(&ustrWallpaper);
+
           return Ret;
       }
     }