diff --git a/doc/zmq_ctx_get_ext.txt b/doc/zmq_ctx_get_ext.txt
index 9fc0ed7b..15aa9d55 100644
--- a/doc/zmq_ctx_get_ext.txt
+++ b/doc/zmq_ctx_get_ext.txt
@@ -54,7 +54,7 @@ The requested option _option_name_ is unknown.
 
 EXAMPLE
 -------
-.Setting a prefix on internal ZMQ threda names:
+.Setting a prefix on internal ZMQ thread names:
 ----
 void *context = zmq_ctx_new ();
 const char prefix[] = "MyApp";
diff --git a/doc/zmq_ctx_set_ext.txt b/doc/zmq_ctx_set_ext.txt
index 25773b21..016fa0e3 100644
--- a/doc/zmq_ctx_set_ext.txt
+++ b/doc/zmq_ctx_set_ext.txt
@@ -58,7 +58,7 @@ The requested option _option_name_ is unknown.
 
 EXAMPLE
 -------
-.Setting a prefix on internal ZMQ threda names:
+.Setting a prefix on internal ZMQ thread names:
 ----
 void *context = zmq_ctx_new ();
 const char prefix[] = "MyApp";