--- a/src/PCSC/pcsclite.h.in
+++ b/src/PCSC/pcsclite.h.in
@@ -281,7 +281,7 @@ extern const SCARD_IO_REQUEST g_rgSCardT
 
 #define PCSCLITE_VERSION_NUMBER		"@VERSION@"	/**< Current version */
 /** Maximum readers context (a slot is count as a reader) */
-#define PCSCLITE_MAX_READERS_CONTEXTS			16
+#define PCSCLITE_MAX_READERS_CONTEXTS			256
 
 #define MAX_READERNAME			128