diff --git a/buildtools/msys2installdeps.sh b/buildtools/msys2installdeps.sh
index 997cccb520b7fd4c81a56e449e06dc3b0e82017a..14a504f19d9d74234e95063b0c973a18e8489781 100644
--- a/buildtools/msys2installdeps.sh
+++ b/buildtools/msys2installdeps.sh
@@ -64,7 +64,7 @@ $ARCH-gc \
 $ARCH-gsl \
 $ARCH-gtk4 \
 $ARCH-gtk-doc \
-$ARCH-gtkmm4 \
+$ARCH-gtkmm-4.0 \
 $ARCH-libxslt
 
 # install packaging tools (required for dist-win-* targets)