diff --git a/src/protocols/secure_channel/CASESession.cpp b/src/protocols/secure_channel/CASESession.cpp
index 623265d160349a..209d8b29101b79 100644
--- a/src/protocols/secure_channel/CASESession.cpp
+++ b/src/protocols/secure_channel/CASESession.cpp
@@ -100,9 +100,9 @@ constexpr uint8_t kKDFS1RKeyInfo[] = { 0x53, 0x69, 0x67, 0x6d, 0x61, 0x31, 0x5f,
 constexpr uint8_t kKDFS2RKeyInfo[] = { 0x53, 0x69, 0x67, 0x6d, 0x61, 0x32, 0x5f, 0x52, 0x65, 0x73, 0x75, 0x6d, 0x65 };
 
 constexpr uint8_t kResume1MIC_Nonce[] =
-    /* "NCASE_SigmaR1" */ { 0x4e, 0x43, 0x41, 0x53, 0x45, 0x5f, 0x53, 0x69, 0x67, 0x6d, 0x61, 0x53, 0x31 };
+    /* "NCASE_SigmaS1" */ { 0x4e, 0x43, 0x41, 0x53, 0x45, 0x5f, 0x53, 0x69, 0x67, 0x6d, 0x61, 0x53, 0x31 };
 constexpr uint8_t kResume2MIC_Nonce[] =
-    /* "NCASE_SigmaR2" */ { 0x4e, 0x43, 0x41, 0x53, 0x45, 0x5f, 0x53, 0x69, 0x67, 0x6d, 0x61, 0x53, 0x32 };
+    /* "NCASE_SigmaS2" */ { 0x4e, 0x43, 0x41, 0x53, 0x45, 0x5f, 0x53, 0x69, 0x67, 0x6d, 0x61, 0x53, 0x32 };
 constexpr uint8_t kTBEData2_Nonce[] =
     /* "NCASE_Sigma2N" */ { 0x4e, 0x43, 0x41, 0x53, 0x45, 0x5f, 0x53, 0x69, 0x67, 0x6d, 0x61, 0x32, 0x4e };
 constexpr uint8_t kTBEData3_Nonce[] =