diff --git a/src/libs/zbxalgo/prediction.c b/src/libs/zbxalgo/prediction.c
index e8384727cf6..95734ba179f 100644
--- a/src/libs/zbxalgo/prediction.c
+++ b/src/libs/zbxalgo/prediction.c
@@ -1188,7 +1188,12 @@ out:
 	{
 		result = ZBX_MATH_ERROR;
 	}
-	else if (0 == isfinite(result) || 0.0 > result || DBL_MAX < result)
+	else if (0 != isnan(result))
+	{
+		zabbix_log(LOG_LEVEL_DEBUG, "numerical error");
+		result = ZBX_MATH_ERROR;
+	}
+	else if (0.0 > result || DBL_MAX < result)
 	{
 		result = DBL_MAX;
 	}
diff --git a/tests/libs/zbxcalc/zbx_evaluate_function.yaml b/tests/libs/zbxcalc/zbx_evaluate_function.yaml
index da6d3424e51..642e590cb14 100644
--- a/tests/libs/zbxcalc/zbx_evaluate_function.yaml
+++ b/tests/libs/zbxcalc/zbx_evaluate_function.yaml
@@ -1542,7 +1542,7 @@ in:
   params: '#3,-1'
 out:
   return: SUCCEED
-  value: 1.7976931348623158e+308
+  value: -1
 ---
 test case: Evaluate timeleft(5m,65)
 in:
@@ -4682,7 +4682,7 @@ in:
   params: '#3,1.7976931348623158e+308,"logarithmic"'
 out:
   return: SUCCEED
-  value: 1.7976931348623158E+308
+  value: -1
 ---
 test case: Evaluate lastclock() <- 0.1, 0.2
 in: