diff --git a/sxiv.h b/sxiv.h
index e5458d5..f26a84f 100644
--- a/sxiv.h
+++ b/sxiv.h
@@ -23,4 +23,22 @@
 
 #define VERSION "git-20110117"
 
+#define WARN(...)                                                  \
+	do {                                                             \
+	  fprintf(stderr, "sxiv: %s:%d: warning: ", __FILE__, __LINE__); \
+		fprintf(stderr, __VA_ARGS__);                                  \
+		fprintf(stderr, "\n");                                         \
+	} while (0)
+
+#define FATAL(...)                                                 \
+  do {                                                             \
+		fprintf(stderr, "sxiv: %s:%d: error: ", __FILE__, __LINE__);   \
+		fprintf(stderr, __VA_ARGS__);                                  \
+		fprintf(stderr, "\n");                                         \
+		cleanup();                                                     \
+		exit(1);                                                       \
+	} while (0)
+
+void cleanup();
+
 #endif /* SXIV_H */