diff --git a/R/po.R b/R/po.R
index c60cdaea3..123cd2dd2 100644
--- a/R/po.R
+++ b/R/po.R
@@ -43,8 +43,9 @@
 #' mlr_pipeops$get("learner", lrn("classif.rpart"),
 #'   param_vals = list(cp = 0.3))
 #'
-#' pos(c("pca", original = "nop"))
+#' mlr3pipelines::pos(c("pca", original = "nop"))
 #' \dontshow{ \} }
+# mlr3pipelines::pos instead of just pos() because of https://github.com/mlr-org/mlr3pipelines/issues/751
 po = function(.obj, ...) {
   UseMethod("po")
 }
diff --git a/man/mlr_pipeops_nmf.Rd b/man/mlr_pipeops_nmf.Rd
index 7c8c351df..979dca4a4 100644
--- a/man/mlr_pipeops_nmf.Rd
+++ b/man/mlr_pipeops_nmf.Rd
@@ -96,7 +96,7 @@ See \code{\link[NMF:nmf]{nmf()}}.
 
 \section{Internals}{
 
-Uses the \code{\link[NMF:nmf]{nmf()}} function as well as \code{\link[NMF:basis]{basis()}}, \code{\link[NMF:coef]{coef()}} and
+Uses the \code{\link[NMF:nmf]{nmf()}} function as well as \code{\link[NMF:basis-coef-methods]{basis()}}, \code{\link[NMF:basis-coef-methods]{coef()}} and
 \code{\link[MASS:ginv]{ginv()}}.
 }
 
diff --git a/man/mlr_pipeops_rowapply.Rd b/man/mlr_pipeops_rowapply.Rd
index 85e0ac30e..cc15306ab 100644
--- a/man/mlr_pipeops_rowapply.Rd
+++ b/man/mlr_pipeops_rowapply.Rd
@@ -46,14 +46,13 @@ Function to apply to each row in the affected columns of the task.
 The return value should be a vector of the same length for every input.
 Initialized as \code{\link[base:identity]{identity()}}.
 \item \code{col_prefix} :: \code{character(1)}\cr
-If specified, prefix to be prepended to the column names of affected columns, separated by a dot (\code{.}). Default is \code{""}.
+If specified, prefix to be prepended to the column names of affected columns, separated by a dot (\code{.}). Initialized as \code{""}.
 }
 }
 
 \section{Internals}{
 
-Calls \code{\link{apply}} on the data, using the value of \code{applicator} as \code{FUN} and \code{simplify = TRUE}, then coerces the output via
-\code{\link[data.table:as.data.table]{as.data.table()}}.
+Calls \code{\link{apply}} on the data, using the value of \code{applicator} as \code{FUN}.
 }
 
 \section{Fields}{
diff --git a/man/po.Rd b/man/po.Rd
index 4f44dd219..504375142 100644
--- a/man/po.Rd
+++ b/man/po.Rd
@@ -59,6 +59,6 @@ po(lrn("classif.rpart"), cp = 0.3)
 mlr_pipeops$get("learner", lrn("classif.rpart"),
   param_vals = list(cp = 0.3))
 
-pos(c("pca", original = "nop"))
+mlr3pipelines::pos(c("pca", original = "nop"))
 \dontshow{ \} }
 }