diff --git a/reference/filesystem/functions/fscanf.xml b/reference/filesystem/functions/fscanf.xml
index 6af7f36e9d..b0a42ac742 100644
--- a/reference/filesystem/functions/fscanf.xml
+++ b/reference/filesystem/functions/fscanf.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.2 $ -->
+<!-- $Revision: 1.3 $ -->
 <!-- splitted from ./en/functions/filesystem.xml, last change in rev 1.2 -->
   <refentry id="function.fscanf">
    <refnamediv>
@@ -24,6 +24,13 @@
      Otherwise, if optional parameters are passed, the function will
      return the number of assigned values. The optional parameters
      must be passed by reference.
+    </para>
+    <para>
+     Any whitespace in the format string matches any whitespace in the input
+     stream. This means that even a tab <literal>\n</literal> in the format
+     string can match a single space character in the input stream.
+    </para>
+    <para>
      <example>
       <title><function>fscanf</function> Example</title>
       <programlisting role="php">
diff --git a/reference/strings/functions/sscanf.xml b/reference/strings/functions/sscanf.xml
index f91dad8865..1fbeeaa4b0 100644
--- a/reference/strings/functions/sscanf.xml
+++ b/reference/strings/functions/sscanf.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.2 $ -->
+<!-- $Revision: 1.3 $ -->
 <!-- splitted from ./en/functions/strings.xml, last change in rev 1.33 -->
   <refentry id="function.sscanf">
    <refnamediv>
@@ -23,6 +23,13 @@
      according to the specified <parameter>format</parameter>. If only
      two parameters were passed to this function, the values parsed
      will be returned as an array.
+    </para>
+    <para>
+     Any whitespace in the format string matches any whitespace in the input
+     string. This means that even a tab \n in the format string can match a
+     single space character in the input string.
+    </para>
+    <para>
      <example>
       <title><function>sscanf</function> Example</title>
       <programlisting role="php">