diff --git a/src/common/strconv.cpp b/src/common/strconv.cpp
index dad4598c23..c55469c0a2 100644
--- a/src/common/strconv.cpp
+++ b/src/common/strconv.cpp
@@ -78,7 +78,7 @@
 
 #define TRACE_STRCONV _T("strconv")
 
-#ifdef SIZEOF_WCHAR_T == 2
+#if SIZEOF_WCHAR_T == 2
     #define WC_UTF16
 #endif