diff --git a/doc/efun/mappingp b/doc/efun/mappingp
new file mode 100644
index 0000000..fef2ac7
--- /dev/null
+++ b/doc/efun/mappingp
@@ -0,0 +1,9 @@
+SYNOPSIS:
+	int mappingp(mixed arg)
+
+DESCRIPTION:
+	Return 1 if the argument is a mapping, or 0 if it is not. 
+
+SEE ALSO:
+	intp(E), stringp(E), objectp(E), pointerp(E), mkmapping(E),
+	m_indices(E), m_values(E), m_delete(E), sizeof(E)