diff --git a/ddraw.rc b/ddraw.rc
index 9a80d98..add2f79 100644
--- a/ddraw.rc
+++ b/ddraw.rc
@@ -1,6 +1,6 @@
 1 VERSIONINFO
-FILEVERSION 1,1,5,3
-PRODUCTVERSION 1,1,5,3
+FILEVERSION 1,1,5,4
+PRODUCTVERSION 1,1,5,4
 {
     BLOCK "StringFileInfo"
     {
@@ -8,13 +8,13 @@ PRODUCTVERSION 1,1,5,3
         {
             VALUE "CompanyName", "cncnet.org"
             VALUE "FileDescription", "DirectDraw replacement for C&C95 and Red Alert"
-            VALUE "FileVersion", "1.1.5.3"
+            VALUE "FileVersion", "1.1.5.4"
             VALUE "InternalName", "ddraw"
             VALUE "LegalCopyright", "Copyright (c) 2010-2018"
             VALUE "LegalTrademarks", ""
             VALUE "OriginalFileName", "ddraw.dll"
             VALUE "ProductName", "DirectDraw replacement for C&C95 and Red Alert"
-            VALUE "ProductVersion", "1.1.5.3"
+            VALUE "ProductVersion", "1.1.5.4"
             VALUE "Comments", "https://cncnet.org"
         }
     }
diff --git a/inc/main.h b/inc/main.h
index 746a9c4..4fe056e 100644
--- a/inc/main.h
+++ b/inc/main.h
@@ -84,6 +84,7 @@ typedef struct IDirectDrawImpl
     char screenshotKey;
     BOOL opengl_pbo;
     BOOL fullscreen;
+    BOOL maintas;
     
 } IDirectDrawImpl;
 
diff --git a/src/main.c b/src/main.c
index 8b02b9b..8c75d50 100644
--- a/src/main.c
+++ b/src/main.c
@@ -895,6 +895,8 @@ HRESULT WINAPI DirectDrawCreate(GUID FAR* lpGUID, LPDIRECTDRAW FAR* lplpDD, IUnk
             "windowed=false\n"
             "; show window borders in windowed mode\n"
             "border=true\n"
+            "; maintain aspect ratio (GDI only!)\n"
+            "maintas=false\n"
             "; use letter- or windowboxing to make a best fit (GDI only!)\n"
             "boxing=false\n"
             "; real rendering rate, -1 = screen rate, 0 = unlimited, n = cap\n"
@@ -961,6 +963,16 @@ HRESULT WINAPI DirectDrawCreate(GUID FAR* lpGUID, LPDIRECTDRAW FAR* lplpDD, IUnk
     {
         This->boxing = TRUE;
     }
+    
+    GetPrivateProfileStringA("ddraw", "maintas", "FALSE", tmp, sizeof(tmp), SettingsIniPath);
+    if (tolower(tmp[0]) == 'n' || tolower(tmp[0]) == 'f' || tolower(tmp[0]) == 'd' || tmp[0] == '0')
+    {
+        This->maintas = FALSE;
+    }
+    else
+    {
+        This->maintas = TRUE;
+    }
 
     GetPrivateProfileStringA("ddraw", "screenshotKey", "G", tmp, sizeof(tmp), SettingsIniPath);
     ddraw->screenshotKey = toupper(tmp[0]);
diff --git a/src/render_soft.c b/src/render_soft.c
index 06132af..7d7665e 100644
--- a/src/render_soft.c
+++ b/src/render_soft.c
@@ -69,7 +69,21 @@ DWORD WINAPI render_soft_main(void)
     DWORD tick_end = 0;
     DWORD frame_len = 0;
 
-    if (ddraw->boxing)
+    if (ddraw->maintas)
+    {
+        dst_width = ddraw->render.width;
+        dst_height = ((float)ddraw->height / ddraw->width) * dst_width;
+        
+        if (dst_height > ddraw->render.height)
+        {
+            dst_width = ((float)dst_width / dst_height) * ddraw->render.height;
+            dst_height = ddraw->render.height;
+        }
+         
+        dst_top = ddraw->render.height / 2 - dst_height / 2;
+        dst_left = ddraw->render.width / 2 - dst_width / 2;
+    }
+    else if (ddraw->boxing)
     {
         dst_width = ddraw->width;
         dst_height = ddraw->height;