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-rw-r--r--modules/pam_pwhistory/opasswd.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/modules/pam_pwhistory/opasswd.c b/modules/pam_pwhistory/opasswd.c
index 274fdb92..836d713e 100644
--- a/modules/pam_pwhistory/opasswd.c
+++ b/modules/pam_pwhistory/opasswd.c
@@ -108,7 +108,7 @@ compare_password(const char *newpass, const char *oldpass)
outval = crypt (newpass, oldpass);
#endif
- return strcmp(outval, oldpass) == 0;
+ return outval != NULL && strcmp(outval, oldpass) == 0;
}
/* Check, if the new password is already in the opasswd file. */