diff --git a/rpcs3/Crypto/unedat.cpp b/rpcs3/Crypto/unedat.cpp
index f16525c7c..ea8c9bab5 100644
--- a/rpcs3/Crypto/unedat.cpp
+++ b/rpcs3/Crypto/unedat.cpp
@@ -156,6 +156,12 @@ int decrypt_data(rFile *in, rFile *out, EDAT_SDAT_HEADER *edat, NPD_HEADER *npd,
 		int length = 0;
 		int compression_end = 0;
 
+		if ((edat->flags & EDAT_FLAG_0x3C) != 0 || (edat->flags & EDAT_FLAG_0x3D) != 0)
+		{
+			ConLog.Error("EDAT: Flag 0x3C/0x3D EDAT files are unsupported yet");
+			return -1;
+		}
+		
 		if ((edat->flags & EDAT_COMPRESSED_FLAG) != 0)
 		{
 			unsigned char metadata[0x20];
diff --git a/rpcs3/Crypto/unedat.h b/rpcs3/Crypto/unedat.h
index 01ce706f3..4d6094979 100644
--- a/rpcs3/Crypto/unedat.h
+++ b/rpcs3/Crypto/unedat.h
@@ -9,6 +9,8 @@
 #define EDAT_FLAG_0x10 0x00000010
 #define EDAT_FLAG_0x20 0x00000020
 #define EDAT_DEBUG_DATA_FLAG 0x80000000
+#define EDAT_FLAG_0x3C 0x0000003C
+#define EDAT_FLAG_0x3D 0x0000003D
 
 typedef struct 
 {
@@ -31,4 +33,4 @@ typedef struct
 	unsigned long long file_size;
 } EDAT_SDAT_HEADER;
 
-int DecryptEDAT(const std::string& input_file_name, const std::string& output_file_name, int mode, const std::string& rap_file_name, unsigned char *custom_klic, bool verbose);
\ No newline at end of file
+int DecryptEDAT(const std::string& input_file_name, const std::string& output_file_name, int mode, const std::string& rap_file_name, unsigned char *custom_klic, bool verbose);