--- /n/sources/plan9/sys/include/bin.h	Sat Jan 10 10:00:05 2015
+++ /sys/include/bin.h	Sun Jun 28 00:00:00 2026
@@ -5,6 +5,6 @@ typedef struct Bin	Bin;
 
 #pragma incomplete Bin
 
-void	*binalloc(Bin **, ulong size, int zero);
-void	*bingrow(Bin **, void *op, ulong osize, ulong size, int zero);
+void	*binalloc(Bin **, uintptr size, int zero);
+void	*bingrow(Bin **, void *op, uintptr osize, uintptr size, int zero);
 void	binfree(Bin **);
--- /n/sources/plan9/sys/src/libbin/bin.c	Sat Jan 10 10:00:05 2015
+++ /sys/src/libbin/bin.c	Sun Jun 28 00:00:00 2026
@@ -4,8 +4,11 @@
 
 enum
 {
-	StructAlign = sizeof(union {vlong vl; double d; ulong p; void *v;
-				struct{vlong v;}vs; struct{double d;}ds; struct{ulong p;}ss; struct{void *v;}xs;})
+	StructAlign = sizeof(union {
+		vlong vl; double d; ulong p; void *v;
+		struct{vlong v;}vs; struct{double d;}ds;
+		struct{ulong p;}ss; struct{void *v;}xs;
+	})
 };
 
 enum
@@ -16,7 +19,7 @@ enum
 struct Bin
 {
 	Bin	*next;
-	ulong	total;			/* total bytes allocated in can->next */
+	uintptr	total;			/* total bytes allocated in can->next */
 	uintptr	pos;
 	uintptr	end;
 	uintptr	v;			/* last value allocated */
@@ -27,11 +30,11 @@ struct Bin
  * allocator which allows an entire set to be freed at one time
  */
 static Bin*
-mkbin(Bin *bin, ulong size)
+mkbin(Bin *bin, uintptr size)
 {
 	Bin *b;
 
-	size = ((size << 1) + (BinSize - 1)) & ~(BinSize - 1);
+	size = ((size << 1) + (BinSize - 1)) & ~((uintptr)BinSize - 1);
 	b = malloc(sizeof(Bin) + size - BinSize);
 	if(b == nil)
 		return nil;
@@ -45,7 +48,7 @@ mkbin(Bin *bin, ulong size)
 }
 
 void*
-binalloc(Bin **bin, ulong size, int zero)
+binalloc(Bin **bin, uintptr size, int zero)
 {
 	Bin *b;
 	uintptr p;
@@ -60,7 +63,7 @@ binalloc(Bin **bin, ulong size, int zero)
 		*bin = b;
 	}
 	p = b->pos;
-	p = (p + (StructAlign - 1)) & ~(StructAlign - 1);
+	p = (p + (StructAlign - 1)) & ~((uintptr)StructAlign - 1);
 	if(p + size > b->end){
 		b = mkbin(b, size);
 		if(b == nil)
@@ -76,7 +79,7 @@ binalloc(Bin **bin, ulong size, int zero)
 }
 
 void*
-bingrow(Bin **bin, void *op, ulong osize, ulong size, int zero)
+bingrow(Bin **bin, void *op, uintptr osize, uintptr size, int zero)
 {
 	Bin *b;
 	void *np;