diff --git a/>require b/>require
index 5e5aded..6872905 100644
--- a/>require
+++ b/>require
@@ -584,6 +584,7 @@
 #	define intptr_t ssize_t
 #	define uint8_t unsigned char
 #	define int8_t signed char
+#	define ptrdiff_t intptr_t
 	/* 经常成立 结束 */
 #endif
 
diff --git a/module< b/module<
index 270afe7..eb7ec68 100644
--- a/module<
+++ b/module<
@@ -63,6 +63,7 @@
 #	define intptr_t ssize_t
 #	define uint8_t unsigned char
 #	define int8_t signed char
+#	define ptrdiff_t intptr_t
 	/* 经常成立 结束 */
 #endif
 
diff --git a/prelude.h b/prelude.h
index f2a055c..24b0e0e 100644
--- a/prelude.h
+++ b/prelude.h
@@ -62,6 +62,7 @@
 #	define intptr_t ssize_t
 #	define uint8_t unsigned char
 #	define int8_t signed char
+#	define ptrdiff_t intptr_t
 	/* 经常成立 结束 */
 #endif
 
diff --git a/require< b/require<
index 3d7e19d..b7fb157 100644
--- a/require<
+++ b/require<
@@ -580,6 +580,7 @@
 #	define intptr_t ssize_t
 #	define uint8_t unsigned char
 #	define int8_t signed char
+#	define ptrdiff_t intptr_t
 	/* 经常成立 结束 */
 #endif