diff --git a/cmd/shfmt/shfmt.1.scd b/cmd/shfmt/shfmt.1.scd
index 84dd2dec..20553ff3 100644
--- a/cmd/shfmt/shfmt.1.scd
+++ b/cmd/shfmt/shfmt.1.scd
@@ -73,6 +73,9 @@ predictable. Some aspects of the format can be configured via printer flags.
 *-filename* str
 	Provide a name for the standard input file.
 
+	Use of this flag is necessary for EditorConfig support to work,
+	since EditorConfig files are found relative to the location of a script.
+
 ## Printer flags
 
 *-i*, *--indent* <uint>
diff --git a/cmd/shfmt/testdata/script/editorconfig.txtar b/cmd/shfmt/testdata/script/editorconfig.txtar
index 99037c13..34af5234 100644
--- a/cmd/shfmt/testdata/script/editorconfig.txtar
+++ b/cmd/shfmt/testdata/script/editorconfig.txtar
@@ -14,6 +14,10 @@ stdin stdin-filename-bash
 ! exec shfmt -filename=foo_posix.sh
 stderr '^foo_posix.sh:.* arrays are a bash'
 
+stdin stdin-filename-bash
+! exec shfmt -filename=${WORK}/foo_posix.sh
+stderr ^${WORK@R}/'foo_posix.sh:.* arrays are a bash'
+
 # Using a file path should use EditorConfig, including with the use of flags
 # like -l.
 exec shfmt input.sh