diff --git a/rosapps/smartpdf/baseutils/win_util.c b/rosapps/smartpdf/baseutils/win_util.c
index b1588ac0c6a..9dfa45e5a65 100644
--- a/rosapps/smartpdf/baseutils/win_util.c
+++ b/rosapps/smartpdf/baseutils/win_util.c
@@ -315,7 +315,7 @@ TCHAR *get_app_data_folder_path(BOOL f_create)
         return tstr_dup(_T(""));
 #else
     /* if all else fails, just use root ("\") directory */
-    return tstr_dup(_T(""));
+    return (TCHAR*)str_dup(_T("")); /* @note: mingw doesn't support tstr_dup */
 #endif
 }
 
@@ -363,7 +363,7 @@ TCHAR *load_string_dup(int str_id)
         assert(0);
         return NULL;
     }
-    return tstr_dup(buf);
+    return (TCHAR*)str_dup(buf); /* @note: mingw doesn't support tstr_dup */
 }
 
 const TCHAR *load_string(int str_id)
diff --git a/rosapps/smartpdf/fitz/mupdf/pdf_font.c b/rosapps/smartpdf/fitz/mupdf/pdf_font.c
index 4b5c8d71d39..a58ba5f9014 100644
--- a/rosapps/smartpdf/fitz/mupdf/pdf_font.c
+++ b/rosapps/smartpdf/fitz/mupdf/pdf_font.c
@@ -45,7 +45,7 @@ enum { UNKNOWN, TYPE1, TRUETYPE, CID };
 
 static int ftkind(FT_Face face)
 {
-    const char *kind = FT_Get_X11_Font_Format(face);
+    /*const char *kind = FT_Get_X11_Font_Format(face);
     pdf_logfont("ft font format %s\n", kind);
     if (!strcmp(kind, "TrueType"))
         return TRUETYPE;
@@ -55,7 +55,9 @@ static int ftkind(FT_Face face)
         return TYPE1;
     if (!strcmp(kind, "CID Type 1"))
         return TYPE1;
-    return UNKNOWN;
+    return UNKNOWN;*/
+		/* @note: work-around */
+		return TYPE1;
 }
 
 static inline int ftcidtogid(pdf_font *font, int cid)