diff --git a/src/ssl.c b/src/ssl.c
index 00a0148fc..60971a356 100644
--- a/src/ssl.c
+++ b/src/ssl.c
@@ -27486,7 +27486,7 @@ int wolfSSL_ASN1_TIME_to_tm(const WOLFSSL_ASN1_TIME* asnTime, struct tm* tm)
         }
 
         currentTime = XTIME(0);
-        if (currentTime < 0) {
+        if (currentTime <= 0) {
             WOLFSSL_MSG("Failed to get current time.");
             return WOLFSSL_FAILURE;
         }
@@ -30242,7 +30242,7 @@ int wolfSSL_ASN1_TIME_diff(int *days, int *secs, const WOLFSSL_ASN1_TIME *from,
     }
 
     fromSecs = XMKTIME(fromTm);
-    if (fromSecs < 0) {
+    if (fromSecs <= 0) {
         WOLFSSL_MSG("XMKTIME for from time failed.");
         return WOLFSSL_FAILURE;
     }
@@ -30261,7 +30261,7 @@ int wolfSSL_ASN1_TIME_diff(int *days, int *secs, const WOLFSSL_ASN1_TIME *from,
     }
 
     toSecs = XMKTIME(toTm);
-    if (toSecs < 0) {
+    if (toSecs <= 0) {
         WOLFSSL_MSG("XMKTIME for to time failed.");
         return WOLFSSL_FAILURE;
     }