diff --git a/xorriso/xorrisofs.1 b/xorriso/xorrisofs.1
index df88eca3..7d0c0b98 100644
--- a/xorriso/xorrisofs.1
+++ b/xorriso/xorrisofs.1
@@ -920,7 +920,7 @@ supplied by xorriso in the course of image production: Block address of
 the Primary Volume Descriptor, block address of the boot image file,
 size of the boot image file.
 .TP
-\fB\fR --grub2-boot-info
+\fB--grub2-boot-info\fR
 Overwrite bytes 2548 to 2555 in the current boot image by the address
 of that boot image.
 The address is written as 64 bit little\-endian number. It is the
@@ -980,7 +980,7 @@ Alias of \-G.
 \fB--embedded-boot\fR disk_path
 Alias of \-G.
 .TP
-\fB\fR --grub2-mbr disk_path
+\fB--grub2-mbr\fR disk_path
 Install disk_path in the System Area and treat it as modern GRUB2 MBR.
 The content start address of the first boot
 image is converted to a count of 512 byte blocks, and an offset of 4 is added.
@@ -1151,7 +1151,7 @@ Alias of \-B.
 \fB\-sparc-label\fR text
 Set the ASCII label text of a SUN Disk Label.
 .TP
-\fB\fR --grub2-sparc-core iso_rr_path
+\fB--grub2-sparc-core\fR iso_rr_path
 Cause the content address and size of the given data file in the image
 to be written after the SUN Disk Label. Both numbers are counted in bytes.
 The address is written as 64 bit big\-endian number to byte 0x228.
diff --git a/xorriso/xorrisofs.texi b/xorriso/xorrisofs.texi
index 266a2c3f..28b4edeb 100644
--- a/xorriso/xorrisofs.texi
+++ b/xorriso/xorrisofs.texi
@@ -1270,7 +1270,7 @@ supplied by xorriso in the course of image production: Block address of
 the Primary Volume Descriptor, block address of the boot image file,
 size of the boot image file.
 @c man .TP
-@item  @minus{}@minus{}grub2-boot-info
+@item @minus{}@minus{}grub2-boot-info
 @kindex  @minus{}@minus{}grub2-boot-info   Patch El Torito boot image
 @cindex Bootability, boot image patching,  @minus{}@minus{}grub2-boot-info
 Overwrite bytes 2548 to 2555 in the current boot image by the address
@@ -1350,7 +1350,7 @@ Alias of -G.
 @kindex @minus{}@minus{}embedded-boot   Fill System Area e.g. by MBR
 Alias of -G.
 @c man .TP
-@item  @minus{}@minus{}grub2-mbr disk_path
+@item @minus{}@minus{}grub2-mbr disk_path
 @kindex  @minus{}@minus{}grub2-mbr   Install modern GRUB2 MBR
 @cindex Bootability, install modern GRUB2 MBR,  @minus{}@minus{}grub2-mbr
 Install disk_path in the System Area and treat it as modern GRUB2 MBR.
@@ -1558,7 +1558,7 @@ Alias of -B.
 @cindex Bootability, SUN Disk Label text, -sparc-label
 Set the ASCII label text of a SUN Disk Label.
 @c man .TP
-@item  @minus{}@minus{}grub2-sparc-core iso_rr_path
+@item @minus{}@minus{}grub2-sparc-core iso_rr_path
 @kindex  @minus{}@minus{}grub2-sparc-core   SUN SPARC core file
 @cindex Bootability, control,  @minus{}@minus{}grub2-sparc-core
 Cause the content address and size of the given data file in the image