diff --git a/include/osmocom/msc/gsm_data.h b/include/osmocom/msc/gsm_data.h
index 11b6e82..bcee213 100644
--- a/include/osmocom/msc/gsm_data.h
+++ b/include/osmocom/msc/gsm_data.h
@@ -83,7 +83,7 @@
 	[MSC_CTR_SMS_DELIVER_UNKNOWN_ERROR] =	{"sms:deliver_unknown_error", "Unknown error occurred during sms delivery."},
 	/* FIXME: count also sms delivered */
 	[MSC_CTR_CALL_MO_SETUP] = 		{"call:mo_setup", "Received setup requests from a MS to init a MO call."},
-	[MSC_CTR_CALL_MO_CONNECT_ACK] = 		{"call:mo_connect_ack", "Received a connect ack from MS of a MO call. Call is now succesful connected up."},
+	[MSC_CTR_CALL_MO_CONNECT_ACK] = 		{"call:mo_connect_ack", "Received a connect ack from MS of a MO call. Call is now successful connected up."},
 	[MSC_CTR_CALL_MT_SETUP] = 		{"call:mt_setup", "Sent setup requests to the MS (MT)."},
 	[MSC_CTR_CALL_MT_CONNECT] = 		{"call:mt_connect", "Sent a connect to the MS (MT)."},
 	[MSC_CTR_CALL_ACTIVE] =			{"call:active", "Count total amount of calls that ever reached active state."},
diff --git a/include/osmocom/msc/mncc.h b/include/osmocom/msc/mncc.h
index 28ee9b3..4414a8d 100644
--- a/include/osmocom/msc/mncc.h
+++ b/include/osmocom/msc/mncc.h
@@ -53,7 +53,7 @@
 #define MNCC_SETUP_CNF		0x0104
 #define MNCC_SETUP_COMPL_REQ	0x0105
 #define MNCC_SETUP_COMPL_IND	0x0106
-/* MNCC_REJ_* is perfomed via MNCC_REL_* */
+/* MNCC_REJ_* is performed via MNCC_REL_* */
 #define MNCC_CALL_CONF_IND	0x0107
 #define MNCC_CALL_PROC_REQ	0x0108
 #define MNCC_PROGRESS_REQ	0x0109
@@ -132,7 +132,7 @@
 	/* which fields are present */
 	uint32_t	fields;
 
-	/* data derived informations (MNCC_F_ based) */
+	/* data derived information (MNCC_F_ based) */
 	struct gsm_mncc_bearer_cap	bearer_cap;
 	struct gsm_mncc_number		called;
 	struct gsm_mncc_number		calling;
diff --git a/include/osmocom/msc/msc_roles.h b/include/osmocom/msc/msc_roles.h
index b22bc7b..4957175 100644
--- a/include/osmocom/msc/msc_roles.h
+++ b/include/osmocom/msc/msc_roles.h
@@ -236,7 +236,7 @@
 	MSC_A_EV_FROM_T_SEND_END_SIGNAL_REQUEST,
 
 	/* gsm_04_08.c has successfully received a valid Complete Layer 3 message, i.e. Location Updating, CM Service
-	 * Request, Paging Reponse or IMSI Detach. */
+	 * Request, Paging Response or IMSI Detach. */
 	MSC_A_EV_COMPLETE_LAYER_3_OK,
 
 	/* Received a Classmark Update -- during GERAN ciphering, msc_a may have to wait for Classmark information to
diff --git a/include/osmocom/msc/sgs_server.h b/include/osmocom/msc/sgs_server.h
index a89022d..400bd9e 100644
--- a/include/osmocom/msc/sgs_server.h
+++ b/include/osmocom/msc/sgs_server.h
@@ -44,7 +44,7 @@
 		char vlr_name[SGS_VLR_NAME_MAXLEN];
 		/* timers on VLR side */
 		unsigned int timer[_NUM_SGS_STATE_TIMERS];
-		/* countrs on VLR side */
+		/* counters on VLR side */
 		unsigned int counter[_NUM_SGS_STATE_COUNTERS];
 	} cfg;
 };
diff --git a/include/osmocom/msc/vlr.h b/include/osmocom/msc/vlr.h
index 52912eb..ee5a234 100644
--- a/include/osmocom/msc/vlr.h
+++ b/include/osmocom/msc/vlr.h
@@ -40,7 +40,7 @@
 
 /* VLR subscriber authentication state */
 enum vlr_subscr_auth_state {
-	/* subscriber needs to be autenticated */
+	/* subscriber needs to be authenticated */
 	VLR_SUB_AS_NEEDS_AUTH,
 	/* waiting for AuthInfo from HLR/AUC */
 	VLR_SUB_AS_NEEDS_AUTH_WAIT_AI,
@@ -66,7 +66,7 @@
 	VLR_ULA_E_SEND_ID_NACK,	/* Result of Send-ID from PVLR */
 	VLR_ULA_E_AUTH_RES,	/* Result of auth procedure */
 	VLR_ULA_E_CIPH_RES,	/* Result of Ciphering Mode Command */
-	VLR_ULA_E_ID_IMSI,	/* IMSI recieved from MS */
+	VLR_ULA_E_ID_IMSI,	/* IMSI received from MS */
 	VLR_ULA_E_ID_IMEI,	/* IMEI received from MS */
 	VLR_ULA_E_ID_IMEISV,	/* IMEISV received from MS */
 	VLR_ULA_E_HLR_IMEI_ACK,	/* Check_IMEI_VLR result from HLR */
@@ -420,7 +420,7 @@
 
 void vlr_subscr_enable_expire_lu(struct vlr_subscr *vsub);
 
-/* Process Acccess Request FSM */
+/* Process Access Request FSM */
 
 enum proc_arq_vlr_event {
 	PR_ARQ_E_START,