diff --git a/lib/libnx/include/nx/NcaUtils.h b/lib/libnx/include/nx/NcaUtils.h
index 81f7163..50365b4 100644
--- a/lib/libnx/include/nx/NcaUtils.h
+++ b/lib/libnx/include/nx/NcaUtils.h
@@ -9,5 +9,6 @@ namespace nx
 		static inline size_t sectorToOffset(size_t sector_index) { return sector_index * nx::nca::kSectorSize; }
 		static void decryptNcaHeader(const byte_t* src, byte_t* dst, const crypto::aes::sAesXts128Key& key);
 		static byte_t getMasterKeyRevisionFromKeyGeneration(byte_t key_generation);
+		static void getNcaPartitionAesCtr(const nx::sNcaFsHeader* hdr, byte_t* ctr);
 	};
 }
\ No newline at end of file
diff --git a/lib/libnx/source/NcaUtils.cpp b/lib/libnx/source/NcaUtils.cpp
index 145ccdf..0ffa1ad 100644
--- a/lib/libnx/source/NcaUtils.cpp
+++ b/lib/libnx/source/NcaUtils.cpp
@@ -46,4 +46,12 @@ byte_t nx::NcaUtils::getMasterKeyRevisionFromKeyGeneration(byte_t key_generation
 	}
 
 	return masterkey_rev;
+}
+
+void nx::NcaUtils::getNcaPartitionAesCtr(const nx::sNcaFsHeader* hdr, byte_t* ctr)
+{
+	for (size_t i = 0; i < 16; i++)
+	{
+		ctr[15-i] = hdr->base_ctr.iv[i];
+	}
 }
\ No newline at end of file