diff --git a/logback-classic/src/main/java/ch/qos/logback/classic/spi/ThrowableProxy.java b/logback-classic/src/main/java/ch/qos/logback/classic/spi/ThrowableProxy.java
index b4b816c16e..89cf4f3139 100644
--- a/logback-classic/src/main/java/ch/qos/logback/classic/spi/ThrowableProxy.java
+++ b/logback-classic/src/main/java/ch/qos/logback/classic/spi/ThrowableProxy.java
@@ -84,7 +84,7 @@ public ThrowableProxy(Throwable throwable, Set<Throwable> alreadyProcessedSet) {
         Throwable[] throwableSuppressed = throwable.getSuppressed();
         // while JDK's implementation of getSuppressed() will always return a non-null array,
         // this might not be the case in mocked throwables. We are being extra defensive here.
-        if (OptionHelper.isNotEmtpy(throwableSuppressed)) {
+        if (OptionHelper.isNotEmpty(throwableSuppressed)) {
             List<ThrowableProxy> suppressedList = new ArrayList<>(throwableSuppressed.length);
             for (Throwable sup : throwableSuppressed) {
                 if (alreadyProcessedSet.contains(sup)) {
diff --git a/logback-core/src/main/java/ch/qos/logback/core/util/OptionHelper.java b/logback-core/src/main/java/ch/qos/logback/core/util/OptionHelper.java
index e38b8ebafe..07d9fd0ab5 100644
--- a/logback-core/src/main/java/ch/qos/logback/core/util/OptionHelper.java
+++ b/logback-core/src/main/java/ch/qos/logback/core/util/OptionHelper.java
@@ -291,7 +291,7 @@ final public static boolean isNullOrEmpty(Object[] array) {
                 return false;
     }
 
-    final public static boolean isNotEmtpy(Object[] array) {
+    final public static boolean isNotEmpty(Object[] array) {
         return !isNullOrEmpty(array);
     }
 }