diff --git a/DirectXTex/DirectXTexDDS.cpp b/DirectXTex/DirectXTexDDS.cpp
index 141cac8..73af518 100644
--- a/DirectXTex/DirectXTexDDS.cpp
+++ b/DirectXTex/DirectXTexDDS.cpp
@@ -528,7 +528,7 @@ HRESULT _EncodeDDSHeader( const TexMetadata& metadata, DWORD flags,
     {
     case TEX_DIMENSION_TEXTURE1D:
 #ifdef _AMD64_
-        if ( metadata.height > 0xFFFFFFFF )
+        if ( metadata.width > 0xFFFFFFFF )
             return E_INVALIDARG;
 #endif
 
diff --git a/Texconv/texconv.cpp b/Texconv/texconv.cpp
index 03f4d05..7863398 100644
--- a/Texconv/texconv.cpp
+++ b/Texconv/texconv.cpp
@@ -338,7 +338,7 @@ void PrintUsage()
     wprintf( L"   -hflip              horizonal flip of source image\n");
     wprintf( L"   -vflip              vertical flip of source image\n");
     wprintf( L"   -sepalpha           resize/generate mips alpha channel separately from color channels\n");
-    wprintf( L"   -pmalpha            convert final texture to premultiply alpha\n");
+    wprintf( L"   -pmalpha            convert final texture to use premultiplied alpha\n");
     wprintf( L"   -t{u|f}             DDS files with TYPELESS format is treated as UNORM or FLOAT\n");
     wprintf( L"   -dword              Use DWORD instead of BYTE alignment (DDS input only)\n");
     wprintf( L"   -dx10               Force use of 'DX10' extended header (DDS output only)\n");