diff --git a/client/X11/xf_floatbar.c b/client/X11/xf_floatbar.c
index 9fcdc5087..b59e519cb 100644
--- a/client/X11/xf_floatbar.c
+++ b/client/X11/xf_floatbar.c
@@ -63,7 +63,7 @@ typedef struct
 	int type;
 	bool focus;
 	bool clicked;
-	OnClick onclick;
+	WINPR_ATTR_NODISCARD OnClick onclick;
 	Window handle;
 } xfFloatbarButton;
 
diff --git a/client/common/cmdline.c b/client/common/cmdline.c
index f4d4e28cd..81acc27ae 100644
--- a/client/common/cmdline.c
+++ b/client/common/cmdline.c
@@ -975,7 +975,7 @@ typedef struct
 	const char* optname;
 	FreeRDP_Settings_Keys_String id;
 	CmdLineSubOptionType opttype;
-	CmdLineSubOptionCb cb;
+	WINPR_ATTR_NODISCARD CmdLineSubOptionCb cb;
 } CmdLineSubOptions;
 
 static BOOL parseSubOptions(rdpSettings* settings, const CmdLineSubOptions* opts, size_t count,
diff --git a/client/iOS/FreeRDP/ios_freerdp.h b/client/iOS/FreeRDP/ios_freerdp.h
index 6aa60fc9b..1d454f610 100644
--- a/client/iOS/FreeRDP/ios_freerdp.h
+++ b/client/iOS/FreeRDP/ios_freerdp.h
@@ -39,7 +39,7 @@ typedef struct mf_context
 	CLIPRDR_FORMAT *serverFormats;
 	CliprdrClientContext *cliprdr;
 	UINT32 clipboardCapabilities;
-	pServerCutText ServerCutText;
+	WINPR_ATTR_NODISCARD pServerCutText ServerCutText;
 } mfContext;
 
 struct mf_info