diff --git a/lib/libcurl.rc b/lib/libcurl.rc
index daa2d62d8a..1ceb4691fb 100644
--- a/lib/libcurl.rc
+++ b/lib/libcurl.rc
@@ -32,7 +32,7 @@ VS_VERSION_INFO VERSIONINFO
   FILEVERSION     RC_VERSION
   PRODUCTVERSION  RC_VERSION
   FILEFLAGSMASK   VS_FFI_FILEFLAGSMASK
-#if defined(DEBUGBUILD) || defined(_DEBUG)
+#if defined(DEBUGBUILD) || defined(UNITTESTS) || defined(CURLDEBUG) || defined(_DEBUG)
   FILEFLAGS VS_FF_DEBUG
 #else
   FILEFLAGS 0L
diff --git a/src/curl.rc b/src/curl.rc
index 6fcaf353e4..475dfbe896 100644
--- a/src/curl.rc
+++ b/src/curl.rc
@@ -32,7 +32,7 @@ VS_VERSION_INFO VERSIONINFO
   FILEVERSION     RC_VERSION
   PRODUCTVERSION  RC_VERSION
   FILEFLAGSMASK   VS_FFI_FILEFLAGSMASK
-#if defined(DEBUGBUILD) || defined(_DEBUG)
+#if defined(DEBUGBUILD) || defined(UNITTESTS) || defined(CURLDEBUG) || defined(_DEBUG)
   FILEFLAGS VS_FF_DEBUG
 #else
   FILEFLAGS 0L