diff --git a/server/proxy/pf_channel.h b/server/proxy/pf_channel.h
index 1f0b35613..eb4ea37e3 100644
--- a/server/proxy/pf_channel.h
+++ b/server/proxy/pf_channel.h
@@ -36,6 +36,7 @@ typedef PfChannelResult (*ChannelTrackerPeekFn)(ChannelStateTracker* tracker, BO
 void channelTracker_free(ChannelStateTracker* t);
 
 WINPR_ATTR_MALLOC(channelTracker_free, 1)
+WINPR_ATTR_NODISCARD
 ChannelStateTracker* channelTracker_new(pServerStaticChannelContext* channel,
                                         ChannelTrackerPeekFn fn, void* data);
 
diff --git a/server/proxy/pf_config.c b/server/proxy/pf_config.c
index e3cd4eb47..9c3039424 100644
--- a/server/proxy/pf_config.c
+++ b/server/proxy/pf_config.c
@@ -114,6 +114,7 @@ static const char* key_cert_file = "CertificateFile";
 static const char* key_cert_content = "CertificateContent";
 
 WINPR_ATTR_MALLOC(CommandLineParserFree, 1)
+WINPR_ATTR_NODISCARD
 static char** pf_config_parse_comma_separated_list(const char* list, size_t* count)
 {
 	if (!list || !count)
diff --git a/server/shadow/shadow_capture.h b/server/shadow/shadow_capture.h
index 31de5505d..3d892ff7f 100644
--- a/server/shadow/shadow_capture.h
+++ b/server/shadow/shadow_capture.h
@@ -43,6 +43,7 @@ extern "C"
 	void shadow_capture_free(rdpShadowCapture* capture);
 
 	WINPR_ATTR_MALLOC(shadow_capture_free, 1)
+	WINPR_ATTR_NODISCARD
 	rdpShadowCapture* shadow_capture_new(rdpShadowServer* server);
 
 #ifdef __cplusplus
diff --git a/server/shadow/shadow_encoder.h b/server/shadow/shadow_encoder.h
index dfe00f3ba..23aa80b0d 100644
--- a/server/shadow/shadow_encoder.h
+++ b/server/shadow/shadow_encoder.h
@@ -72,6 +72,7 @@ extern "C"
 	void shadow_encoder_free(rdpShadowEncoder* encoder);
 
 	WINPR_ATTR_MALLOC(shadow_encoder_free, 1)
+	WINPR_ATTR_NODISCARD
 	rdpShadowEncoder* shadow_encoder_new(rdpShadowClient* client);
 
 #ifdef __cplusplus
diff --git a/server/shadow/shadow_mcevent.h b/server/shadow/shadow_mcevent.h
index c78b9206f..b13a89284 100644
--- a/server/shadow/shadow_mcevent.h
+++ b/server/shadow/shadow_mcevent.h
@@ -39,6 +39,7 @@ extern "C"
 	void shadow_multiclient_free(rdpShadowMultiClientEvent* event);
 
 	WINPR_ATTR_MALLOC(shadow_multiclient_free, 1)
+	WINPR_ATTR_NODISCARD
 	rdpShadowMultiClientEvent* shadow_multiclient_new(void);
 
 	void shadow_multiclient_publish(rdpShadowMultiClientEvent* event);
diff --git a/server/shadow/shadow_screen.h b/server/shadow/shadow_screen.h
index a7bf7894b..ca7973a45 100644
--- a/server/shadow/shadow_screen.h
+++ b/server/shadow/shadow_screen.h
@@ -46,6 +46,7 @@ extern "C"
 	void shadow_screen_free(rdpShadowScreen* screen);
 
 	WINPR_ATTR_MALLOC(shadow_screen_free, 1)
+	WINPR_ATTR_NODISCARD
 	rdpShadowScreen* shadow_screen_new(rdpShadowServer* server);
 
 #ifdef __cplusplus
diff --git a/server/shadow/shadow_subsystem.h b/server/shadow/shadow_subsystem.h
index 206dfddb6..e62192ed8 100644
--- a/server/shadow/shadow_subsystem.h
+++ b/server/shadow/shadow_subsystem.h
@@ -32,6 +32,7 @@ extern "C"
 	void shadow_subsystem_free(rdpShadowSubsystem* subsystem);
 
 	WINPR_ATTR_MALLOC(shadow_subsystem_free, 1)
+	WINPR_ATTR_NODISCARD
 	rdpShadowSubsystem* shadow_subsystem_new(void);
 
 	int shadow_subsystem_init(rdpShadowSubsystem* subsystem, rdpShadowServer* server);
diff --git a/server/shadow/shadow_surface.h b/server/shadow/shadow_surface.h
index 277df0a2c..01260e94b 100644
--- a/server/shadow/shadow_surface.h
+++ b/server/shadow/shadow_surface.h
@@ -32,6 +32,7 @@ extern "C"
 	void shadow_surface_free(rdpShadowSurface* surface);
 
 	WINPR_ATTR_MALLOC(shadow_surface_free, 1)
+	WINPR_ATTR_NODISCARD
 	rdpShadowSurface* shadow_surface_new(rdpShadowServer* server, UINT16 x, UINT16 y, UINT32 width,
 	                                     UINT32 height);