diff --git a/include/common/cmdlib.h b/include/common/cmdlib.h
index f6d0227b..787b33d5 100644
--- a/include/common/cmdlib.h
+++ b/include/common/cmdlib.h
@@ -58,7 +58,7 @@ char *ExpandPathAndArchive(char *path);
 
 double I_FloatTime(void);
 
-void Error(const char *error, ...);
+void Error(const char *error, ...) __attribute__((noreturn));
 int CheckParm(const char *check);
 
 FILE *SafeOpenWrite(const char *filename);