diff --git a/qemu-img.c b/qemu-img.c
index d4518e724f..19495bb594 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -185,15 +185,20 @@ static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...)
 static int read_password(char *buf, int buf_size)
 {
     int c, i;
+
     printf("Password: ");
     fflush(stdout);
     i = 0;
     for(;;) {
         c = getchar();
-        if (c == '\n')
+        if (c < 0) {
+            buf[i] = '\0';
+            return -1;
+        } else if (c == '\n') {
             break;
-        if (i < (buf_size - 1))
+        } else if (i < (buf_size - 1)) {
             buf[i++] = c;
+        }
     }
     buf[i] = '\0';
     return 0;