diff --git a/src/tools/chip-cert/CertUtils.cpp b/src/tools/chip-cert/CertUtils.cpp
index ede07039f700f0..dbba8e482901ae 100644
--- a/src/tools/chip-cert/CertUtils.cpp
+++ b/src/tools/chip-cert/CertUtils.cpp
@@ -1015,7 +1015,7 @@ bool MakeAttCert(AttCertType attCertType, const char * subjectCN, uint16_t subje
         VerifyTrueOrExit(res);
     }
 
-    if (certConfig.IsExtensionextSubjectAltNamePresent())
+    if (certConfig.IsExtensionSubjectAltNamePresent())
     {
         // Add optional Subject Alternative Name extentsion.
         res = AddExtension(newCert, NID_subject_alt_name, "DNS:test.com");
diff --git a/src/tools/chip-cert/Cmd_GenAttCert.cpp b/src/tools/chip-cert/Cmd_GenAttCert.cpp
index f7f9d6d4e26f4f..737849eaf4aeb8 100644
--- a/src/tools/chip-cert/Cmd_GenAttCert.cpp
+++ b/src/tools/chip-cert/Cmd_GenAttCert.cpp
@@ -392,7 +392,7 @@ bool HandleOption(const char * progName, OptionSet * optSet, int id, const char
         }
         else if (strcmp(arg, "ext-subject-alt-name") == 0)
         {
-            gCertConfig.SetExtensionextSubjectAltNamePresent();
+            gCertConfig.SetExtensionSubjectAltNamePresent();
         }
         else if (strcmp(arg, "no-error") != 0)
         {
diff --git a/src/tools/chip-cert/chip-cert.h b/src/tools/chip-cert/chip-cert.h
index 3b25036d37e4ed..d51d3b89291d25 100644
--- a/src/tools/chip-cert/chip-cert.h
+++ b/src/tools/chip-cert/chip-cert.h
@@ -150,7 +150,7 @@ class AttCertStructConfig
     void SetExtensionSKIDMissing() { mFlags.Set(CertErrorFlags::kExtSKIDMissing); }
     void SetExtensionExtendedKeyUsagePresent() { mFlags.Set(CertErrorFlags::kExtExtendedKeyUsage); }
     void SetExtensionAuthorityInfoAccessPresent() { mFlags.Set(CertErrorFlags::kExtAuthorityInfoAccess); }
-    void SetExtensionextSubjectAltNamePresent() { mFlags.Set(CertErrorFlags::kExtSubjectAltName); }
+    void SetExtensionSubjectAltNamePresent() { mFlags.Set(CertErrorFlags::kExtSubjectAltName); }
 
     bool IsErrorTestCaseEnabled() { return mEnabled; }
     int GetCertVersion() { return (mEnabled && mFlags.Has(CertErrorFlags::kCertVersion)) ? 1 : 2; }
@@ -206,7 +206,7 @@ class AttCertStructConfig
     bool IsExtensionSKIDPresent() { return (!mEnabled || !mFlags.Has(CertErrorFlags::kExtSKIDMissing)); }
     bool IsExtensionExtendedKeyUsagePresent() { return (mEnabled && mFlags.Has(CertErrorFlags::kExtExtendedKeyUsage)); }
     bool IsExtensionAuthorityInfoAccessPresent() { return (mEnabled && mFlags.Has(CertErrorFlags::kExtAuthorityInfoAccess)); }
-    bool IsExtensionextSubjectAltNamePresent() { return (mEnabled && mFlags.Has(CertErrorFlags::kExtSubjectAltName)); }
+    bool IsExtensionSubjectAltNamePresent() { return (mEnabled && mFlags.Has(CertErrorFlags::kExtSubjectAltName)); }
 
 private:
     enum class CertErrorFlags : uint32_t