diff --git a/bin/9 b/bin/9
index 33b0d89c..04a942af 100755
--- a/bin/9
+++ b/bin/9
@@ -1,11 +1,14 @@
 #!/bin/sh
 
-export PLAN9=${PLAN9:-/usr/local/plan9}
+PLAN9=${PLAN9:-/usr/local/plan9}
+export PLAN9
+
 case "$PATH" in
 $PLAN9/bin:*)
 	;;
 *)
-	export PATH=$PLAN9/bin:$PATH
+	PATH=$PLAN9/bin:$PATH
+	export PATH
 	;;
 esac
 
diff --git a/src/cmd/comm.c b/src/cmd/comm.c
index cce02ffc..00cc03b5 100644
--- a/src/cmd/comm.c
+++ b/src/cmd/comm.c
@@ -93,7 +93,6 @@ main(int argc, char *argv[])
 			continue;
 		}
 	}
-	exits(0);
 }
 
 int
diff --git a/src/cmd/ed.c b/src/cmd/ed.c
index 3af90f6f..0b4be590 100644
--- a/src/cmd/ed.c
+++ b/src/cmd/ed.c
@@ -758,7 +758,6 @@ gety(void)
 		if(p >= &linebuf[LBSIZE-2])
 			error(Q);
 	}
-	return 0;
 }
 
 int
diff --git a/src/cmd/import.c b/src/cmd/import.c
index f084b8e6..456f663d 100644
--- a/src/cmd/import.c
+++ b/src/cmd/import.c
@@ -243,7 +243,7 @@ shuffle(void *arg)
 			if(tbuf == nil)
 				tbuf = emalloc(BLEN+1);
 			memmove(tbuf, buf, n);	// because convM2S is destructive
-			if(convM2S(tbuf, n, t) != n)
+			if(convM2S((uchar*)tbuf, n, t) != n)
 				fprint(dfd, "%d->%d convert error in convM2S", fd[0], fd[1]);
 			else
 				fprint(dfd, "%d->%d %F\n", fd[0], fd[1], t);
diff --git a/src/libventi/client.c b/src/libventi/client.c
index 772b430f..b06e0fbe 100644
--- a/src/libventi/client.c
+++ b/src/libventi/client.c
@@ -136,7 +136,7 @@ vtwrite(VtConn *z, uchar score[VtScoreSize], uint type, uchar *buf, int n)
 {
 	Packet *p;
 
-	p = packetforeign(buf, n, nil, nil);
+	p = packetforeign(buf, n, 0, nil);
 	return vtwritepacket(z, score, type, p);
 }
 
diff --git a/src/libventi/file.c b/src/libventi/file.c
index ac81c2a3..6c151859 100644
--- a/src/libventi/file.c
+++ b/src/libventi/file.c
@@ -16,10 +16,7 @@
 #include <libc.h>
 #include <venti.h>
 
-enum
-{
-	MaxBlock = (1UL<<31),
-};
+#define MaxBlock (1UL<<31)
 
 static char EBadEntry[] = "bad VtEntry";
 static char ENotDir[] = "walk in non-directory";
diff --git a/src/libventi/packet.c b/src/libventi/packet.c
index 98f697cb..3ef1b1df 100644
--- a/src/libventi/packet.c
+++ b/src/libventi/packet.c
@@ -752,7 +752,6 @@ packetcmp(Packet *pkt0, Packet *pkt1)
 			n1 = FRAGSIZE(f1);
 		}
 	}
-	return 0; /* for ken */
 }