diff --git a/src/libopensc/errors.c b/src/libopensc/errors.c
index be4d967d..fd304e73 100644
--- a/src/libopensc/errors.c
+++ b/src/libopensc/errors.c
@@ -38,6 +38,7 @@ const char *sc_strerror(int error)
 		"Input operation canelled (keypad)",
 		"The two PINs did not match (keypad)",
 		"Message too long (keypad)",
+		"Timeout while waiting for event (card reader)",
 	};
 	const int rdr_base = -SC_ERROR_READER;
 	const char *card_errors[] = {
diff --git a/src/libopensc/errors.h b/src/libopensc/errors.h
index d2e3a0fc..59c01803 100644
--- a/src/libopensc/errors.h
+++ b/src/libopensc/errors.h
@@ -41,6 +41,7 @@ extern "C" {
 #define SC_ERROR_KEYPAD_CANCELLED		-1109
 #define SC_ERROR_KEYPAD_PIN_MISMATCH		-1110
 #define SC_ERROR_KEYPAD_MSG_TOO_LONG		-1111
+#define SC_ERROR_EVENT_TIMEOUT			-1112
 
 /* Resulting from a card command or related to the card*/
 #define SC_ERROR_CARD_CMD_FAILED		-1200