diff --git a/src/gmp.mk b/src/gmp.mk
index b830f4a6..06b3dae6 100644
--- a/src/gmp.mk
+++ b/src/gmp.mk
@@ -26,6 +26,7 @@ define $(PKG)_BUILD
         --host='$(TARGET)' \
         --prefix='$(PREFIX)/$(TARGET)' \
         --disable-shared \
+        --enable-cxx \
         --without-readline
     $(MAKE) -C '$(1)' -j '$(JOBS)'
     $(MAKE) -C '$(1)' -j 1 install