diff --git a/docs/manual.txt b/docs/manual.txt
index 3f067742..29f897e9 100644
--- a/docs/manual.txt
+++ b/docs/manual.txt
@@ -4212,7 +4212,7 @@ OPTIONS
 
 --dmre
 
-    For Data Matrix symbols, allow Data Matrix Rectangular Extended (RMRE) sizes
+    For Data Matrix symbols, allow Data Matrix Rectangular Extended (DMRE) sizes
     when considering automatic sizes.
 
 --dotsize=NUMBER
diff --git a/docs/zint.1 b/docs/zint.1
index b55ce825..4f583313 100644
--- a/docs/zint.1
+++ b/docs/zint.1
@@ -130,7 +130,7 @@ pipe or a file.
 Use \f[V]--filetype\f[R] to specify output format.
 .TP
 \f[V]--dmre\f[R]
-For Data Matrix symbols, allow Data Matrix Rectangular Extended (RMRE)
+For Data Matrix symbols, allow Data Matrix Rectangular Extended (DMRE)
 sizes when considering automatic sizes.
 .TP
 \f[V]--dotsize=NUMBER\f[R]
diff --git a/docs/zint.1.pmd b/docs/zint.1.pmd
index c497217f..2e2a656d 100644
--- a/docs/zint.1.pmd
+++ b/docs/zint.1.pmd
@@ -90,7 +90,7 @@ Paintbrush (`PCX`), Portable Network Format (`PNG`), Scalable Vector Graphic (`S
 
 `--dmre`
 
-:   For Data Matrix symbols, allow Data Matrix Rectangular Extended (RMRE) sizes when considering automatic sizes.
+:   For Data Matrix symbols, allow Data Matrix Rectangular Extended (DMRE) sizes when considering automatic sizes.
 
 `--dotsize=NUMBER`