1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib/libcrypto/err/err.c b/src/lib/libcrypto/err/err.c
index 5abe44e6d5..9b532d1f4c 100644
--- a/src/lib/libcrypto/err/err.c
+++ b/src/lib/libcrypto/err/err.c
@@ -1023,7 +1023,7 @@ void ERR_add_error_data(int num, ...)
                                 else
                                         str=p;
                                 }
-                        strcat(str,a);
+                        strlcat(str,a,s+1);
                         }
                 }
         ERR_set_error_data(str,ERR_TXT_MALLOCED|ERR_TXT_STRING);