diff --git a/lib/vssh/libssh.c b/lib/vssh/libssh.c
index c6dc63ae66..02148d0c18 100644
--- a/lib/vssh/libssh.c
+++ b/lib/vssh/libssh.c
@@ -1665,6 +1665,8 @@ static CURLcode myssh_statemach_act(struct Curl_easy *data, bool *block)
             size = 0;
           }
           else {
+            if((to - from) == CURL_OFF_T_MAX)
+              return CURLE_RANGE_ERROR;
             size = to - from + 1;
           }
 
diff --git a/lib/vssh/libssh2.c b/lib/vssh/libssh2.c
index e9dfef950d..3a661f81eb 100644
--- a/lib/vssh/libssh2.c
+++ b/lib/vssh/libssh2.c
@@ -2544,6 +2544,8 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
             size = 0;
           }
           else {
+            if((to - from) == CURL_OFF_T_MAX)
+              return CURLE_RANGE_ERROR;
             size = to - from + 1;
           }