diff --git a/include/libssh/priv.h b/include/libssh/priv.h
index a4e08cac..da07d93a 100644
--- a/include/libssh/priv.h
+++ b/include/libssh/priv.h
@@ -146,10 +146,10 @@ int gettimeofday(struct timeval *__p, void *__t);
 #define ERROR_BUFFERLEN 1024
 #endif
 #ifndef CLIENTBANNER1
-#define CLIENTBANNER1 "SSH-1.5-libssh-" SSH_STRINGIFY(LIBSSH_VERSION)
+#define CLIENTBANNER1 "SSH-1.5-libssh_" SSH_STRINGIFY(LIBSSH_VERSION)
 #endif
 #ifndef CLIENTBANNER2
-#define CLIENTBANNER2 "SSH-2.0-libssh-" SSH_STRINGIFY(LIBSSH_VERSION)
+#define CLIENTBANNER2 "SSH-2.0-libssh_" SSH_STRINGIFY(LIBSSH_VERSION)
 #endif
 #ifndef KBDINT_MAX_PROMPT
 #define KBDINT_MAX_PROMPT 256 /* more than openssh's :) */