diff --git a/channels/printer/client/printer_main.c b/channels/printer/client/printer_main.c
index 2240e594c..40e78dd6a 100644
--- a/channels/printer/client/printer_main.c
+++ b/channels/printer/client/printer_main.c
@@ -79,6 +79,7 @@ static const char* filemap[] = { "PortDosName", "PnPName", "DriverName",
 	                             "CachedPrinterConfigData" };
 
 WINPR_ATTR_MALLOC(free, 1)
+WINPR_ATTR_NODISCARD
 static char* get_printer_hash(const WCHAR* name, size_t length)
 {
 	BYTE hash[WINPR_SHA256_DIGEST_LENGTH] = { 0 };
@@ -90,6 +91,7 @@ static char* get_printer_hash(const WCHAR* name, size_t length)
 }
 
 WINPR_ATTR_MALLOC(free, 1)
+WINPR_ATTR_NODISCARD
 static char* get_printer_config_path(const rdpSettings* settings, const WCHAR* name, size_t length)
 {
 	char* config = NULL;
diff --git a/channels/rdpear/common/rdpear-common/ndr.h b/channels/rdpear/common/rdpear-common/ndr.h
index cec5121c0..f1ab443e7 100644
--- a/channels/rdpear/common/rdpear-common/ndr.h
+++ b/channels/rdpear/common/rdpear-common/ndr.h
@@ -130,14 +130,17 @@ extern "C"
 	}
 
 	WINPR_ATTR_MALLOC(ndr_context_free, 1)
+	WINPR_ATTR_NODISCARD
 	NdrContext* ndr_context_new(BOOL bigEndianDrep, BYTE version);
 
 	void ndr_context_reset(NdrContext* context);
 
 	WINPR_ATTR_MALLOC(ndr_context_free, 1)
+	WINPR_ATTR_NODISCARD
 	NdrContext* ndr_context_copy(const NdrContext* src);
 
 	WINPR_ATTR_MALLOC(ndr_context_free, 1)
+	WINPR_ATTR_NODISCARD
 	NdrContext* ndr_read_header(wStream* s);
 
 	BOOL ndr_write_header(NdrContext* context, wStream* s);
diff --git a/channels/rdpear/common/rdpear-common/rdpear_common.h b/channels/rdpear/common/rdpear-common/rdpear_common.h
index e1b06b178..e3a6a102a 100644
--- a/channels/rdpear/common/rdpear-common/rdpear_common.h
+++ b/channels/rdpear/common/rdpear-common/rdpear_common.h
@@ -81,6 +81,7 @@ typedef enum
 
 FREERDP_LOCAL RdpEarPackageType rdpear_packageType_from_name(const WinPrAsn1_OctetString* package);
 WINPR_ATTR_MALLOC(Stream_Free, 1)
+WINPR_ATTR_NODISCARD
 FREERDP_LOCAL wStream* rdpear_encodePayload(BOOL isKerb, wStream* payload);
 
 #define RDPEAR_COMMON_MESSAGE_DECL(V)                                                            \
diff --git a/channels/rdpecam/client/camera.h b/channels/rdpecam/client/camera.h
index f0f4f9d9a..9ec4c0555 100644
--- a/channels/rdpecam/client/camera.h
+++ b/channels/rdpecam/client/camera.h
@@ -265,6 +265,7 @@ UINT ecam_channel_write(CameraPlugin* ecam, GENERIC_CHANNEL_CALLBACK* hchannel,
 void ecam_dev_destroy(CameraDevice* dev);
 
 WINPR_ATTR_MALLOC(ecam_dev_destroy, 1)
+WINPR_ATTR_NODISCARD
 CameraDevice* ecam_dev_create(CameraPlugin* ecam, const char* deviceId, const char* deviceName);
 
 /* video encoding interface */
diff --git a/channels/urbdrc/common/msusb.h b/channels/urbdrc/common/msusb.h
index 4c426130f..8bc60af84 100644
--- a/channels/urbdrc/common/msusb.h
+++ b/channels/urbdrc/common/msusb.h
@@ -85,9 +85,11 @@ extern "C"
 	FREERDP_API void msusb_msconfig_free(MSUSB_CONFIG_DESCRIPTOR* MsConfig);
 
 	WINPR_ATTR_MALLOC(msusb_msconfig_free, 1)
+	WINPR_ATTR_NODISCARD
 	FREERDP_API MSUSB_CONFIG_DESCRIPTOR* msusb_msconfig_new(void);
 
 	WINPR_ATTR_MALLOC(msusb_msconfig_free, 1)
+	WINPR_ATTR_NODISCARD
 	FREERDP_API MSUSB_CONFIG_DESCRIPTOR* msusb_msconfig_read(wStream* s, UINT32 NumInterfaces);
 	FREERDP_API BOOL msusb_msconfig_write(const MSUSB_CONFIG_DESCRIPTOR* MsConfg, wStream* out);
 	FREERDP_API void msusb_msconfig_dump(const MSUSB_CONFIG_DESCRIPTOR* MsConfg);