diff --git a/sys/src/9/vt4/fns.h b/sys/src/9/vt4/fns.h
index b5144d0..8e9249d 100644
--- a/sys/src/9/vt4/fns.h
+++ b/sys/src/9/vt4/fns.h
@@ -8,8 +8,8 @@ typedef struct Ether Ether;
 #pragma incomplete Dma
 
 void	addconf(char*, char*);
-int	adec(long*);
-int	ainc(long*);
+long	adec(long*);
+long	ainc(long*);
 void	archetherspeed(int, int);
 void	archinit(void);
 uint	archmiiport(int);
diff --git a/sys/src/9/vt4/l.s b/sys/src/9/vt4/l.s
index 380ae61..ad886c0 100644
--- a/sys/src/9/vt4/l.s
+++ b/sys/src/9/vt4/l.s
@@ -440,8 +440,8 @@ tas0:
 	ISYNC
 	RETURN
 
-TEXT _xinc(SB), 1, $-4			/* int _xinc(int*); */
-TEXT ainc(SB), 1, $-4			/* int ainc(int*); */
+TEXT _xinc(SB), 1, $-4			/* long _xinc(long*); */
+TEXT ainc(SB), 1, $-4			/* long ainc(long*); */
 	MOVW	R3, R4
 _ainc:
 	DCBF	(R4)			/* fix for 603x bug */
@@ -459,8 +459,8 @@ _trap:
 _return:
 	RETURN
 
-TEXT _xdec(SB), 1, $-4			/* int _xdec(int*); */
-TEXT adec(SB), 1, $-4			/* int adec(int*); */
+TEXT _xdec(SB), 1, $-4			/* long _xdec(long*); */
+TEXT adec(SB), 1, $-4			/* long adec(long*); */
 	MOVW	R3, R4
 _adec:
 	DCBF	(R4)			/* fix for 603x bug */
diff --git a/sys/src/9/vt5/fns.h b/sys/src/9/vt5/fns.h
index 198d981..f9a31b2 100644
--- a/sys/src/9/vt5/fns.h
+++ b/sys/src/9/vt5/fns.h
@@ -8,8 +8,8 @@ typedef struct Ether Ether;
 #pragma incomplete Dma
 
 void	addconf(char*, char*);
-int	adec(long*);
-int	ainc(long*);
+long	adec(long*);
+long	ainc(long*);
 void	archetherspeed(int, int);
 void	archinit(void);
 uint	archmiiport(int);
diff --git a/sys/src/9/vt5/l.s b/sys/src/9/vt5/l.s
index cf9d6be..77d0dfc 100644
--- a/sys/src/9/vt5/l.s
+++ b/sys/src/9/vt5/l.s
@@ -661,8 +661,8 @@ tas1:
 tas0:
 	RETURN
 
-TEXT _xinc(SB), 1, $-4				/* int _xinc(int*); */
-TEXT ainc(SB), 1, $-4				/* int ainc(int*); */
+TEXT _xinc(SB), 1, $-4				/* long _xinc(long*); */
+TEXT ainc(SB), 1, $-4				/* long ainc(long*); */
 	MOVW	R3, R4
 _ainc:
 	DCBF	(R4)				/* fix for 603x bug */
@@ -679,8 +679,8 @@ _trap:
 _return:
 	RETURN
 
-TEXT _xdec(SB), 1, $-4				/* int _xdec(int*); */
-TEXT adec(SB), 1, $-4				/* int adec(int*); */
+TEXT _xdec(SB), 1, $-4				/* long _xdec(long*); */
+TEXT adec(SB), 1, $-4				/* long adec(long*); */
 	MOVW	R3, R4
 _adec:
 	DCBF	(R4)				/* fix for 603x bug */