diff --git a/lib/libc/stdio/fvwrite.c b/lib/libc/stdio/fvwrite.c
index 50b32b8eca6..2a161859afa 100644
--- a/lib/libc/stdio/fvwrite.c
+++ b/lib/libc/stdio/fvwrite.c
@@ -54,6 +54,7 @@ int
 __sfvwrite(FILE *fp, struct __suio *uio)
 {
 	size_t len;
+	unsigned char *old_p;
 	char *p;
 	struct __siov *iov;
 	int w, s;
@@ -137,8 +138,12 @@ __sfvwrite(FILE *fp, struct __suio *uio)
 				COPY(w);
 				/* fp->_w -= w; */ /* unneeded */
 				fp->_p += w;
-				if (__fflush(fp))
+				old_p = fp->_p;
+				if (__fflush(fp) == EOF) {
+					if (old_p == fp->_p)
+						fp->_p -= w;
 					goto err;
+				}
 			} else if (len >= (w = fp->_bf._size)) {
 				/* write directly */
 				w = _swrite(fp, p, w);
@@ -177,8 +182,12 @@ __sfvwrite(FILE *fp, struct __suio *uio)
 				COPY(w);
 				/* fp->_w -= w; */
 				fp->_p += w;
-				if (__fflush(fp))
+				old_p = fp->_p;
+				if (__fflush(fp) == EOF) {
+					if (old_p == fp->_p)
+						fp->_p -= w;
 					goto err;
+				}
 			} else if (s >= (w = fp->_bf._size)) {
 				w = _swrite(fp, p, w);
 				if (w <= 0)