diff --git a/libbb/procps.c b/libbb/procps.c
index 46e9827..e405fb7 100644
--- a/libbb/procps.c
+++ b/libbb/procps.c
@@ -57,7 +57,7 @@
 		sprintf(status, "/proc/%d", pid);
 		if(stat(status, &sb))
 			continue;
-		my_getpwuid(curstatus.user, sb.st_uid);
+		my_getpwuid(curstatus.user, sb.st_uid, sizeof(curstatus.user));
 
 		sprintf(status, "/proc/%d/stat", pid);
 		if((fp = fopen(status, "r")) == NULL)