diff --git a/fltk.spec b/fltk.spec
index 54894e0..e60adca 100644
--- a/fltk.spec
+++ b/fltk.spec
@@ -48,6 +48,7 @@ BuildRequires:  pkgconfig(zlib)
 # MinGW
 BuildRequires:  mingw32-filesystem >= 95
 BuildRequires:  mingw32-gcc
+BuildRequires:  mingw32-gcc-c++
 BuildRequires:  mingw32-binutils
 BuildRequires:  mingw32-gettext
 BuildRequires:  mingw32-win-iconv
@@ -58,6 +59,7 @@ BuildRequires:  mingw32-libjpeg
 
 BuildRequires:  mingw64-filesystem >= 95
 BuildRequires:  mingw64-gcc
+BuildRequires:  mingw64-gcc-c++
 BuildRequires:  mingw64-binutils
 BuildRequires:  mingw64-gettext
 BuildRequires:  mingw64-win-iconv