diff --git a/dlls/ntdll/virtual.c b/dlls/ntdll/virtual.c
index fb6ede656ee..78973a8cda4 100644
--- a/dlls/ntdll/virtual.c
+++ b/dlls/ntdll/virtual.c
@@ -3203,7 +3203,7 @@ void virtual_fill_image_information( const pe_image_info_t *pe_info, SECTION_IMA
     info->DllCharacteristics   = pe_info->dll_charact;
     info->Machine              = pe_info->machine;
     info->ImageContainsCode    = pe_info->contains_code;
-    info->u.ImageFlags         = pe_info->image_flags & ~IMAGE_FLAGS_WineFakeDll;
+    info->u.ImageFlags         = pe_info->image_flags & ~(IMAGE_FLAGS_WineBuiltin|IMAGE_FLAGS_WineFakeDll);
     info->LoaderFlags          = pe_info->loader_flags;
     info->ImageFileSize        = pe_info->file_size;
     info->CheckSum             = pe_info->checksum;
diff --git a/include/wine/server_protocol.h b/include/wine/server_protocol.h
index c3d1bb6a593..9e26aa4fb76 100644
--- a/include/wine/server_protocol.h
+++ b/include/wine/server_protocol.h
@@ -720,6 +720,7 @@ typedef struct
 #define IMAGE_FLAGS_ImageDynamicallyRelocated 0x04
 #define IMAGE_FLAGS_ImageMappedFlat           0x08
 #define IMAGE_FLAGS_BaseBelow4gb              0x10
+#define IMAGE_FLAGS_WineBuiltin               0x40
 #define IMAGE_FLAGS_WineFakeDll               0x80
 
 struct rawinput_device
diff --git a/server/mapping.c b/server/mapping.c
index ddc8be890f3..348072456ab 100644
--- a/server/mapping.c
+++ b/server/mapping.c
@@ -558,6 +558,7 @@ static int load_clr_header( IMAGE_COR20_HEADER *hdr, size_t va, size_t size, int
 /* retrieve the mapping parameters for an executable (PE) image */
 static unsigned int get_image_params( struct mapping *mapping, file_pos_t file_size, int unix_fd )
 {
+    static const char builtin_signature[] = "Wine builtin DLL";
     static const char fakedll_signature[] = "Wine placeholder DLL";
 
     IMAGE_COR20_HEADER clr;
@@ -565,7 +566,7 @@ static unsigned int get_image_params( struct mapping *mapping, file_pos_t file_s
     struct
     {
         IMAGE_DOS_HEADER dos;
-        char buffer[sizeof(fakedll_signature)];
+        char buffer[32];
     } mz;
     struct
     {
@@ -702,7 +703,9 @@ static unsigned int get_image_params( struct mapping *mapping, file_pos_t file_s
     mapping->image.gp            = 0; /* FIXME */
     mapping->image.file_size     = file_size;
     mapping->image.loader_flags  = clr_va && clr_size;
-    if (mz_size == sizeof(mz) && !memcmp( mz.buffer, fakedll_signature, sizeof(fakedll_signature) ))
+    if (mz_size == sizeof(mz) && !memcmp( mz.buffer, builtin_signature, sizeof(builtin_signature) ))
+        mapping->image.image_flags |= IMAGE_FLAGS_WineBuiltin;
+    else if (mz_size == sizeof(mz) && !memcmp( mz.buffer, fakedll_signature, sizeof(fakedll_signature) ))
         mapping->image.image_flags |= IMAGE_FLAGS_WineFakeDll;
 
     /* load the section headers */
diff --git a/server/protocol.def b/server/protocol.def
index 888e22faf7e..79e9802aa6b 100644
--- a/server/protocol.def
+++ b/server/protocol.def
@@ -736,6 +736,7 @@ typedef struct
 #define IMAGE_FLAGS_ImageDynamicallyRelocated 0x04
 #define IMAGE_FLAGS_ImageMappedFlat           0x08
 #define IMAGE_FLAGS_BaseBelow4gb              0x10
+#define IMAGE_FLAGS_WineBuiltin               0x40
 #define IMAGE_FLAGS_WineFakeDll               0x80
 
 struct rawinput_device