1 files changed, 1 insertions, 1 deletions
diff --git a/util.h b/util.h
index e7a567d..a62043b 100644
--- a/util.h
+++ b/util.h
@@ -63,7 +63,7 @@ typedef struct {
 
 void* s_malloc(size_t);
 void* s_realloc(void*, size_t);
-char* s_strdup(char*);
+char* s_strdup(const char*);
 
 void warn(const char*, ...);
 void die(const char*, ...);