diff --git a/doc/protocol/commands-and-replies.rst b/doc/protocol/commands-and-replies.rst
index ce8c3ced..59cd77a2 100644
--- a/doc/protocol/commands-and-replies.rst
+++ b/doc/protocol/commands-and-replies.rst
@@ -92,7 +92,7 @@ Responses
 +--------------------+---------+----------------------------------------------------------+-----------+
 | REPLY_FMT          | 0x51    | Card Data Report, Character Array                        | Yes       |
 +--------------------+---------+----------------------------------------------------------+-----------+
-| REPLY_KEYPPAD      | 0x53    | Keypad Data Report                                       | Yes       |
+| REPLY_KEYPAD       | 0x53    | Keypad Data Report                                       | Yes       |
 +--------------------+---------+----------------------------------------------------------+-----------+
 | REPLY_COM          | 0x54    | Communication Configuration Report                       | Yes       |
 +--------------------+---------+----------------------------------------------------------+-----------+
diff --git a/src/osdp_common.c b/src/osdp_common.c
index dd64043e..25ff7503 100644
--- a/src/osdp_common.c
+++ b/src/osdp_common.c
@@ -100,7 +100,7 @@ const char *osdp_reply_name(int reply_id)
 		[REPLY_RSTATR    - REPLY_ACK] = "RSTATR",
 		[REPLY_RAW       - REPLY_ACK] = "RAW",
 		[REPLY_FMT       - REPLY_ACK] = "FMT",
-		[REPLY_KEYPPAD   - REPLY_ACK] = "KEYPPAD",
+		[REPLY_KEYPAD    - REPLY_ACK] = "KEYPAD",
 		[REPLY_COM       - REPLY_ACK] = "COM",
 		[REPLY_BIOREADR  - REPLY_ACK] = "BIOREADR",
 		[REPLY_BIOMATCHR - REPLY_ACK] = "BIOMATCHR",
diff --git a/src/osdp_common.h b/src/osdp_common.h
index c5e08728..ad78c994 100644
--- a/src/osdp_common.h
+++ b/src/osdp_common.h
@@ -181,7 +181,7 @@ union osdp_ephemeral_data {
 #define REPLY_RSTATR	0x4B
 #define REPLY_RAW	0x50
 #define REPLY_FMT	0x51
-#define REPLY_KEYPPAD	0x53
+#define REPLY_KEYPAD	0x53
 #define REPLY_COM	0x54
 #define REPLY_BIOREADR	0x57
 #define REPLY_BIOMATCHR 0x58
diff --git a/src/osdp_cp.c b/src/osdp_cp.c
index 37a13ebb..1772388c 100644
--- a/src/osdp_cp.c
+++ b/src/osdp_cp.c
@@ -39,7 +39,7 @@
 #define REPLY_NAK_DATA_LEN             1
 #define REPLY_CCRYPT_DATA_LEN          32
 #define REPLY_RMAC_I_DATA_LEN          16
-#define REPLY_KEYPPAD_DATA_LEN         2   /* variable length command */
+#define REPLY_KEYPAD_DATA_LEN          2   /* variable length command */
 #define REPLY_RAW_DATA_LEN             4   /* variable length command */
 #define REPLY_FMT_DATA_LEN             3   /* variable length command */
 #define REPLY_BUSY_DATA_LEN            0
@@ -558,14 +558,14 @@ static int cp_decode_response(struct osdp_pd *pd, uint8_t *buf, int len)
 		pd->baud_rate = temp32;
 		ret = OSDP_CP_ERR_NONE;
 		break;
-	case REPLY_KEYPPAD:
-		if (len < REPLY_KEYPPAD_DATA_LEN) {
+	case REPLY_KEYPAD:
+		if (len < REPLY_KEYPAD_DATA_LEN) {
 			break;
 		}
 		event.type = OSDP_EVENT_KEYPRESS;
 		event.keypress.reader_no = buf[pos++];
 		event.keypress.length = buf[pos++];
-		if ((len - REPLY_KEYPPAD_DATA_LEN) != event.keypress.length) {
+		if ((len - REPLY_KEYPAD_DATA_LEN) != event.keypress.length) {
 			break;
 		}
 		memcpy(event.keypress.data, buf + pos, event.keypress.length);
@@ -1022,7 +1022,7 @@ static bool cp_check_online_response(struct osdp_pd *pd)
 		    pd->reply_id == REPLY_MFGREP ||
 		    pd->reply_id == REPLY_RAW ||
 		    pd->reply_id == REPLY_FMT ||
-		    pd->reply_id == REPLY_KEYPPAD) {
+		    pd->reply_id == REPLY_KEYPAD) {
 			return true;
 		}
 		return ISSET_FLAG(pd, OSDP_FLAG_IGN_UNSOLICITED);
diff --git a/src/osdp_pd.c b/src/osdp_pd.c
index bc00753b..c79ae208 100644
--- a/src/osdp_pd.c
+++ b/src/osdp_pd.c
@@ -150,7 +150,7 @@ static int pd_translate_event(struct osdp_pd *pd, struct osdp_event *event)
 		}
 		break;
 	case OSDP_EVENT_KEYPRESS:
-		reply_code = REPLY_KEYPPAD;
+		reply_code = REPLY_KEYPAD;
 		break;
 	case OSDP_EVENT_STATUS:
 		switch(event->status.type) {
@@ -785,7 +785,7 @@ static int pd_build_reply(struct osdp_pd *pd, uint8_t *buf, int max_len)
 		buf[len++] = BIT_IS_SET(event->status.mask, 0); // power
 		ret = OSDP_PD_ERR_NONE;
 		break;
-	case REPLY_KEYPPAD:
+	case REPLY_KEYPAD:
 		event = (struct osdp_event *)pd->ephemeral_data;
 		assert_buf_len(REPLY_KEYPAD_LEN + event->keypress.length, max_len);
 		buf[len++] = pd->reply_id;