diff --git a/doc/manuals/chapters/counters_generated.adoc b/doc/manuals/chapters/counters_generated.adoc
index 6a3a3d2..1b40d8b 100644
--- a/doc/manuals/chapters/counters_generated.adoc
+++ b/doc/manuals/chapters/counters_generated.adoc
@@ -25,7 +25,7 @@
 | sms:delivered | <<msc_sms:delivered>> | Global SMS Deliver attempts.
 | sms:rp_err_mem | <<msc_sms:rp_err_mem>> | CAUSE_MT_MEM_EXCEEDED errors of MS responses on a sms deliver attempt.
 | sms:rp_err_other | <<msc_sms:rp_err_other>> | Other error of MS responses on a sms delive attempt.
-| sms:deliver_unknown_error | <<msc_sms:deliver_unknown_error>> | Unknown error occured during sms delivery.
+| sms:deliver_unknown_error | <<msc_sms:deliver_unknown_error>> | Unknown error occurred during sms delivery.
 | call:mo_setup | <<msc_call:mo_setup>> | Received setup requests from a MS to init a MO call.
 | call:mo_connect_ack | <<msc_call:mo_connect_ack>> | Received a connect ack from MS of a MO call. Call is now succesful connected up.
 | call:mt_setup | <<msc_call:mt_setup>> | Sent setup requests to the MS (MT).
diff --git a/include/osmocom/msc/gsm_data.h b/include/osmocom/msc/gsm_data.h
index f6e3ed9..6050113 100644
--- a/include/osmocom/msc/gsm_data.h
+++ b/include/osmocom/msc/gsm_data.h
@@ -79,7 +79,7 @@
 	[MSC_CTR_SMS_DELIVERED] = 		{"sms:delivered", "Global SMS Deliver attempts."},
 	[MSC_CTR_SMS_RP_ERR_MEM] = 		{"sms:rp_err_mem", "CAUSE_MT_MEM_EXCEEDED errors of MS responses on a sms deliver attempt."},
 	[MSC_CTR_SMS_RP_ERR_OTHER] = 		{"sms:rp_err_other", "Other error of MS responses on a sms delive attempt."},
-	[MSC_CTR_SMS_DELIVER_UNKNOWN_ERROR] =	{"sms:deliver_unknown_error", "Unknown error occured during sms delivery."},
+	[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."},
diff --git a/include/osmocom/msc/signal.h b/include/osmocom/msc/signal.h
index 16b5678..c7f8991 100644
--- a/include/osmocom/msc/signal.h
+++ b/include/osmocom/msc/signal.h
@@ -89,7 +89,7 @@
 	struct vty *vty;
 };
 struct sms_signal_data {
-	/* The transaction where this occured */
+	/* The transaction where this occurred */
 	struct gsm_trans *trans;
 	/* Can be NULL for SMMA */
 	struct gsm_sms *sms;
diff --git a/src/libmsc/gsm_04_08.c b/src/libmsc/gsm_04_08.c
index 57dff41..ee31747 100644
--- a/src/libmsc/gsm_04_08.c
+++ b/src/libmsc/gsm_04_08.c
@@ -389,7 +389,7 @@
 
 	/* From vlr_loc_update() we expect an implicit dispatch of
 	 * VLR_ULA_E_UPDATE_LA, and thus we expect msc_vlr_subscr_assoc() to
-	 * already have been called and completed. Has an error occured? */
+	 * already have been called and completed. Has an error occurred? */
 
 	vsub = msc_a_vsub(msc_a);
 	if (!vsub) {
@@ -786,7 +786,7 @@
 			 is_utran);
 
 	/* From vlr_proc_acc_req() we expect an implicit dispatch of PR_ARQ_E_START we expect
-	 * msc_vlr_subscr_assoc() to already have been called and completed. Has an error occured? */
+	 * msc_vlr_subscr_assoc() to already have been called and completed. Has an error occurred? */
 	vsub = msc_a_vsub(msc_a);
 	if (!vsub) {
 		LOG_MSC_A(msc_a, LOGL_ERROR, "subscriber not allowed to do a CM Service Request\n");
@@ -1158,7 +1158,7 @@
 			 is_utran);
 
 	/* From vlr_proc_acc_req() we expect an implicit dispatch of PR_ARQ_E_START we expect
-	 * msc_vlr_subscr_assoc() to already have been called and completed. Has an error occured? */
+	 * msc_vlr_subscr_assoc() to already have been called and completed. Has an error occurred? */
 	vsub = msc_a_vsub(msc_a);
 	if (!vsub) {
 		LOG_MSC_A(msc_a, LOGL_ERROR, "subscriber not allowed to do a Paging Response\n");