diff --git a/brmdoor_nfc.cpp b/brmdoor_nfc.cpp
index 7dc5a1f..04ca79b 100644
--- a/brmdoor_nfc.cpp
+++ b/brmdoor_nfc.cpp
@@ -85,14 +85,14 @@ std::string NFCDevice::scanUID() throw(NFCError)
 }
 
 const nfc_modulation NFCDevice::_modulations[5] = {
-        { /*.nmt = */ NMT_ISO14443A, /* .nbr = */ NBR_106 },
-        { /*.nmt = */ NMT_ISO14443B, /* .nbr = */ NBR_106 },
-        { /*.nmt = */ NMT_FELICA,    /* .nbr = */ NBR_212 },
-        { /*.nmt = */ NMT_FELICA,    /* .nbr = */ NBR_424 },
-        { /*.nmt = */ NMT_JEWEL,     /* .nbr = */ NBR_106 },
+        { /*.nmt = */ NMT_ISO14443A, /* .nbr = */ NBR_106 }
+        //{ /*.nmt = */ NMT_ISO14443B, /* .nbr = */ NBR_106 },
+        //{ /*.nmt = */ NMT_FELICA,    /* .nbr = */ NBR_212 },
+        //{ /*.nmt = */ NMT_FELICA,    /* .nbr = */ NBR_424 },
+        //{ /*.nmt = */ NMT_JEWEL,     /* .nbr = */ NBR_106 },
     };
     
-const size_t _modulationsLen = 5;
+const size_t NFCDevice::_modulationsLen = 1;
 
 
 NFCError::NFCError(const std::string& msg)
diff --git a/brmdoor_nfc.h b/brmdoor_nfc.h
index 8d3edb8..143c86b 100644
--- a/brmdoor_nfc.h
+++ b/brmdoor_nfc.h
@@ -92,10 +92,10 @@ public:
 protected:
 
     /** Modulations that specify cards accepted by reader */
-    static const nfc_modulation _modulations[5];    
+    static const nfc_modulation _modulations[5];
 
     /** Number of modulations in _modulations array */
-    static const size_t _modulationsLen = 5;
+    static const size_t _modulationsLen;
 
     /** libnfc-specific opaque context */
     nfc_context *_nfcContext;