diff --git a/Texassemble/texassemble.cpp b/Texassemble/texassemble.cpp
index 34aff99..f7fdb1e 100644
--- a/Texassemble/texassemble.cpp
+++ b/Texassemble/texassemble.cpp
@@ -152,7 +152,7 @@ const SValue g_pOptions[] =
     { nullptr,      0 }
 };
 
-#define DEFFMT(fmt) { L#fmt, DXGI_FORMAT_ ## fmt }
+#define DEFFMT(fmt) { L""#fmt, DXGI_FORMAT_ ## fmt }
 
 const SValue g_pFormats[] =
 {
diff --git a/Texconv/texconv.cpp b/Texconv/texconv.cpp
index 14128d0..2553dba 100644
--- a/Texconv/texconv.cpp
+++ b/Texconv/texconv.cpp
@@ -201,7 +201,7 @@ const SValue g_pOptions[] =
     { nullptr,          0 }
 };
 
-#define DEFFMT(fmt) { L#fmt, DXGI_FORMAT_ ## fmt }
+#define DEFFMT(fmt) { L""#fmt, DXGI_FORMAT_ ## fmt }
 
 const SValue g_pFormats[] =
 {
diff --git a/Texdiag/texdiag.cpp b/Texdiag/texdiag.cpp
index c2cee71..517be1f 100644
--- a/Texdiag/texdiag.cpp
+++ b/Texdiag/texdiag.cpp
@@ -126,7 +126,7 @@ const SValue g_pOptions[] =
     { nullptr,      0 }
 };
 
-#define DEFFMT(fmt) { L#fmt, DXGI_FORMAT_ ## fmt }
+#define DEFFMT(fmt) { L""#fmt, DXGI_FORMAT_ ## fmt }
 
 const SValue g_pFormats[] =
 {