diff --git a/doc/man3/OSSL_DECODER.pod b/doc/man3/OSSL_DECODER.pod
index b951d8d0b9..347df85e1b 100644
--- a/doc/man3/OSSL_DECODER.pod
+++ b/doc/man3/OSSL_DECODER.pod
@@ -73,12 +73,12 @@ OSSL_DECODER_number() returns the internal dynamic number assigned
 to the given I<decoder>.
 
 OSSL_DECODER_names_do_all() traverses all names for the given
-I<decoder>, and calls I<fn> with each name and I<data>.
+I<decoder>, and calls I<fn> with each name and I<data> as arguments.
 
-OSSL_DECODER_do_all_provided() traverses all encoder
+OSSL_DECODER_do_all_provided() traverses all decoder
 implementations by all activated providers in the library context
 I<libctx>, and for each of the implementations, calls I<fn> with the
-implementation method and I<data> as arguments.
+implementation method and I<arg> as arguments.
 
 OSSL_DECODER_gettable_params() returns an L<OSSL_PARAM(3)>
 array of parameter descriptors.
diff --git a/doc/man3/OSSL_ENCODER.pod b/doc/man3/OSSL_ENCODER.pod
index 46e3717276..15f2a5f935 100644
--- a/doc/man3/OSSL_ENCODER.pod
+++ b/doc/man3/OSSL_ENCODER.pod
@@ -73,12 +73,12 @@ OSSL_ENCODER_number() returns the internal dynamic number assigned to
 the given I<encoder>.
 
 OSSL_ENCODER_names_do_all() traverses all names for the given
-I<encoder>, and calls I<fn> with each name and I<data>.
+I<encoder>, and calls I<fn> with each name and I<data> as arguments.
 
 OSSL_ENCODER_do_all_provided() traverses all encoder
 implementations by all activated providers in the library context
 I<libctx>, and for each of the implementations, calls I<fn> with the
-implementation method and I<data> as arguments.
+implementation method and I<arg> as arguments.
 
 OSSL_ENCODER_gettable_params() returns an L<OSSL_PARAM(3)>
 array of parameter descriptors.