diff --git a/frameworks/intl/src/number_format.cpp b/frameworks/intl/src/number_format.cpp
index fcc197ef3decd13c94be036e459914c1e7d7ab9d..b5f5edc94f0392c69dd897777ab9b1849318c222 100644
--- a/frameworks/intl/src/number_format.cpp
+++ b/frameworks/intl/src/number_format.cpp
@@ -175,7 +175,9 @@ void NumberFormat::ParseConfigs(std::map<std::string, std::string> &configs)
         unit = configs["unit"];
         if (configs.count("unitDisplay") > 0) {
             unitDisplayString = configs["unitDisplay"];
-            unitDisplay = unitStyle[unitDisplayString];
+            if (unitStyle.count(unitDisplayString) > 0) {
+                unitDisplay = unitStyle[unitDisplayString];
+            }
         }
         if (configs.count("unitUsage") > 0) {
             unitUsage = configs["unitUsage"];