diff --git a/Contrib/VPatch/Readme.html b/Contrib/VPatch/Readme.html
index 9d287e29..3b9d700c 100644
--- a/Contrib/VPatch/Readme.html
+++ b/Contrib/VPatch/Readme.html
@@ -105,7 +105,7 @@ a:hover
           <p>VPatch allows to create a patch file to update previous versions 
             of your software. The GenPat utility generates the patch file. The 
             plug-in can use the patch to update a file. Using a patch, you can 
-            reduce the download size of your updates, because only the differences 
+            reduce the download size of your updates because only the differences 
             between the files are included in the patch file.</p>
           </div>
           <h2>How to use</h2>
diff --git a/Docs/src/compiler.but b/Docs/src/compiler.but
index 8903efab..fc6d9ffb 100644
--- a/Docs/src/compiler.but
+++ b/Docs/src/compiler.but
@@ -226,8 +226,8 @@ NSIS version used to build the script.
 
 NSIS version as a 32 bit number.
 
-\c !if 0x2046000 >= ${NSIS_PACKEDVERSION}
-\c   !error "NSIS 2.47 or higher is required to build this installer!"
+\c !if 0x3014000 >= "${NSIS_PACKEDVERSION}"
+\c   !error "NSIS 3.15 or higher is required to build this installer!"
 \c !endif
 
 \S1{preunicodecodepoint} $\{U+1\}...$\{U+10FFFF\}
diff --git a/Docs/src/var.but b/Docs/src/var.but
index da7af1a2..2b045df8 100644
--- a/Docs/src/var.but
+++ b/Docs/src/var.but
@@ -237,7 +237,7 @@ This constant is available on Windows XP and above.
 
 \e{$HWNDPARENT}
 
-The decimal HWND of the parent window.
+HWND of the main window (in decimal).
 
 \e{$PLUGINSDIR}
 
diff --git a/Include/Win/WinDef.nsh b/Include/Win/WinDef.nsh
index 1fcb51b5..cf84ee4f 100644
--- a/Include/Win/WinDef.nsh
+++ b/Include/Win/WinDef.nsh
@@ -58,13 +58,9 @@ IntOp ${_tmpvar} "${_whi}" << 16
 IntOp ${_outvar} ${_outvar} | ${_tmpvar}
 !macroend
 !define MAKELONG "!insertmacro _Win_MAKELONG32 "
-!if "${NSIS_PTR_SIZE}" <= 4
 !define MAKEWPARAM "${MAKELONG}"
 !define MAKELPARAM "${MAKELONG}"
 !define MAKELRESULT "${MAKELONG}"
-!else
-!error "Missing 64bit imp!"
-!endif
 
 
 !endif /* __WIN_NOINC_WINDEF */