2 files changed, 6 insertions, 0 deletions

diff --git a/sys/boot/common/loader.8 b/sys/boot/common/loader.8
index 527313bedd63..2d99ec083b98 100644
--- a/sys/boot/common/loader.8
+++ b/sys/boot/common/loader.8
@@ -559,6 +559,9 @@ into buffer
 .Em addr .
 Returns the actual number of bytes read, or -1 in case of error or end of
 file.
+.It Ic heap? Pq -- Ar bytes
+Return the space remaining in the dictionary heap, in bytes.
+This is not related to the heap used by dynamic memory allocation words.
 .It Ic inb Pq Ar port -- char
 Reads a byte from a port.
 .It Ic key Pq -- Ar char
diff --git a/sys/boot/i386/loader/loader.8 b/sys/boot/i386/loader/loader.8
index 527313bedd63..2d99ec083b98 100644
--- a/sys/boot/i386/loader/loader.8
+++ b/sys/boot/i386/loader/loader.8
@@ -559,6 +559,9 @@ into buffer
 .Em addr .
 Returns the actual number of bytes read, or -1 in case of error or end of
 file.
+.It Ic heap? Pq -- Ar bytes
+Return the space remaining in the dictionary heap, in bytes.
+This is not related to the heap used by dynamic memory allocation words.
 .It Ic inb Pq Ar port -- char
 Reads a byte from a port.
 .It Ic key Pq -- Ar char