diff --git a/src/backend/replication/logical/snapbuild.c b/src/backend/replication/logical/snapbuild.c
index a73a7b98f97..227960452d6 100644
--- a/src/backend/replication/logical/snapbuild.c
+++ b/src/backend/replication/logical/snapbuild.c
@@ -499,14 +499,14 @@ SnapBuildBuildSnapshot(SnapBuild *builder, TransactionId xid)
 }
 
 /*
- * Build the initial slot snapshot and convert it to normal snapshot that
+ * Build the initial slot snapshot and convert it to a normal snapshot that
  * is understood by HeapTupleSatisfiesMVCC.
  *
  * The snapshot will be usable directly in current transaction or exported
  * for loading in different transaction.
  */
 Snapshot
-SnapBuildInitalSnapshot(SnapBuild *builder)
+SnapBuildInitialSnapshot(SnapBuild *builder)
 {
 	Snapshot	snap;
 	TransactionId xid;
@@ -514,7 +514,7 @@ SnapBuildInitalSnapshot(SnapBuild *builder)
 	int			newxcnt = 0;
 
 	Assert(!FirstSnapshotSet);
-	Assert(XactIsoLevel = XACT_REPEATABLE_READ);
+	Assert(XactIsoLevel == XACT_REPEATABLE_READ);
 
 	if (builder->state != SNAPBUILD_CONSISTENT)
 		elog(ERROR, "cannot build an initial slot snapshot before reaching a consistent state");
@@ -604,7 +604,7 @@ SnapBuildExportSnapshot(SnapBuild *builder)
 	XactIsoLevel = XACT_REPEATABLE_READ;
 	XactReadOnly = true;
 
-	snap = SnapBuildInitalSnapshot(builder);
+	snap = SnapBuildInitialSnapshot(builder);
 
 	/*
 	 * now that we've built a plain snapshot, make it active and use the
diff --git a/src/backend/replication/walsender.c b/src/backend/replication/walsender.c
index 59ae22df8c8..040ad7b7371 100644
--- a/src/backend/replication/walsender.c
+++ b/src/backend/replication/walsender.c
@@ -938,7 +938,7 @@ CreateReplicationSlot(CreateReplicationSlotCmd *cmd)
 		{
 			Snapshot	snap;
 
-			snap = SnapBuildInitalSnapshot(ctx->snapshot_builder);
+			snap = SnapBuildInitialSnapshot(ctx->snapshot_builder);
 			RestoreTransactionSnapshot(snap, MyProc);
 		}
 
diff --git a/src/include/replication/snapbuild.h b/src/include/replication/snapbuild.h
index 091a9f91e36..a8ae63116a6 100644
--- a/src/include/replication/snapbuild.h
+++ b/src/include/replication/snapbuild.h
@@ -59,7 +59,7 @@ extern void FreeSnapshotBuilder(SnapBuild *cache);
 
 extern void SnapBuildSnapDecRefcount(Snapshot snap);
 
-extern Snapshot SnapBuildInitalSnapshot(SnapBuild *builder);
+extern Snapshot SnapBuildInitialSnapshot(SnapBuild *builder);
 extern const char *SnapBuildExportSnapshot(SnapBuild *snapstate);
 extern void SnapBuildClearExportedSnapshot(void);