diff --git a/include/os.h b/include/os.h
index 929769fb3..c0455928d 100644
--- a/include/os.h
+++ b/include/os.h
@@ -77,8 +77,6 @@ typedef struct _NewClientRec *NewClientPtr;
 
 #define xstrdup(s) Xstrdup(s)
 #define xnfstrdup(s) XNFstrdup(s)
-
-#define xallocarray(num, size) reallocarray(NULL, (num), (size))
 #endif
 
 #include <stdio.h>