diff --git a/test/compare_file.c b/test/compare_file.c
index cd7cdbcd..8a450ba9 100644
--- a/test/compare_file.c
+++ b/test/compare_file.c
@@ -171,7 +171,7 @@ int Compare_2_files(char *adr1, char *adr2, char *adrc, int flag)
      differs= 1;
    }
  }
- if(S_ISREG(s1.st_mode)) {
+ if(S_ISREG(s1.st_mode) && S_ISREG(s2.st_mode)) {
    fd1= open(adr1, O_RDONLY);
    if(fd1==-1) {
      printf("- %s : cannot open() : %s\n", adr1, strerror(errno));