diff --git a/lib/libc/stdio/fvwrite.c b/lib/libc/stdio/fvwrite.c
--- a/lib/libc/stdio/fvwrite.c
+++ b/lib/libc/stdio/fvwrite.c
@@ -51,7 +51,6 @@
 __sfvwrite(FILE *fp, struct __suio *uio)
 {
 	size_t len;
-	unsigned char *old_p;
 	char *p;
 	struct __siov *iov;
 	int w, s;
@@ -135,12 +134,8 @@
 				COPY(w);
 				/* fp->_w -= w; */ /* unneeded */
 				fp->_p += w;
-				old_p = fp->_p;
-				if (__fflush(fp) == EOF) {
-					if (old_p == fp->_p)
-						fp->_p -= w;
+				if (__fflush(fp))
 					goto err;
-				}
 			} else if (len >= (w = fp->_bf._size)) {
 				/* write directly */
 				w = _swrite(fp, p, w);
@@ -179,12 +174,8 @@
 				COPY(w);
 				/* fp->_w -= w; */
 				fp->_p += w;
-				old_p = fp->_p;
-				if (__fflush(fp) == EOF) {
-					if (old_p == fp->_p)
-						fp->_p -= w;
+				if (__fflush(fp))
 					goto err;
-				}
 			} else if (s >= (w = fp->_bf._size)) {
 				w = _swrite(fp, p, w);
 				if (w <= 0)
diff --git a/lib/libc/stdio/wbuf.c b/lib/libc/stdio/wbuf.c
--- a/lib/libc/stdio/wbuf.c
+++ b/lib/libc/stdio/wbuf.c
@@ -49,7 +49,6 @@
 int
 __swbuf(int c, FILE *fp)
 {
-	unsigned char *old_p;
 	int n;
 
 	/*
@@ -85,15 +84,8 @@
 	}
 	fp->_w--;
 	*fp->_p++ = c;
-	old_p = fp->_p;
-	if (++n == fp->_bf._size || (fp->_flags & __SLBF && c == '\n')) {
-		if (__fflush(fp) != 0) {
-			if (fp->_p == old_p) {
-				fp->_p--;
-				fp->_w++;
-			}
+	if (++n == fp->_bf._size || (fp->_flags & __SLBF && c == '\n'))
+		if (__fflush(fp) != 0)
 			return (EOF);
-		}
-	}
 	return (c);
 }