diff --git a/lib/libcurl.rc b/lib/libcurl.rc
index c3945e3717b395356a98ccc22cb8b691f97be94c..eed602e76e593d5658070eaa948ecb33c5ee949b 100644
--- a/lib/libcurl.rc
+++ b/lib/libcurl.rc
@@ -31,7 +31,7 @@ VS_VERSION_INFO VERSIONINFO
   FILEVERSION     RC_VERSION
   PRODUCTVERSION  RC_VERSION
   FILEFLAGSMASK   0x3fL
-#if CURLDEBUG
+#if defined(CURLDEBUG) || defined(_DEBUG)
   FILEFLAGS 1
 #else
   FILEFLAGS 0
diff --git a/src/curl.rc b/src/curl.rc
index 0bb35a4902f06b4548c42e28a479b768e3fd54ba..56d972991fce9192d6b21bb5c329721679b09ed6 100644
--- a/src/curl.rc
+++ b/src/curl.rc
@@ -31,7 +31,7 @@ VS_VERSION_INFO VERSIONINFO
   FILEVERSION     RC_VERSION
   PRODUCTVERSION  RC_VERSION
   FILEFLAGSMASK   0x3fL
-#if CURLDEBUG
+#if defined(CURLDEBUG) || defined(_DEBUG)
   FILEFLAGS 1
 #else
   FILEFLAGS 0