X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/db9b7dcedb001b942ad945a56b2d7bf9b77d7a6a..e497389e51d4c6b50e01fb2e30af9c5a8caf9a65:/unix/uxagentc.c

diff --git a/unix/uxagentc.c b/unix/uxagentc.c
index 3605c601..9f579cd9 100644
--- a/unix/uxagentc.c
+++ b/unix/uxagentc.c
@@ -17,7 +17,8 @@
 
 int agent_exists(void)
 {
-    if (getenv("SSH_AUTH_SOCK") != NULL)
+    const char *p = getenv("SSH_AUTH_SOCK");
+    if (p && *p)
 	return TRUE;
     return FALSE;
 }