diff --git a/configure.ac b/configure.ac
index 3e33706646cf..f48477c64168 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5667,6 +5667,7 @@ if test "$cross_compiling" = "yes"; then
         LibO
         LIBFFI
         LIBPN
+        LIBWEBP
         LIBXML2
         LIBXSLT
         MDDS
diff --git a/external/libwebp/ExternalProject_libwebp.mk b/external/libwebp/ExternalProject_libwebp.mk
index f62d4846d68e..7a709c1bddcf 100644
--- a/external/libwebp/ExternalProject_libwebp.mk
+++ b/external/libwebp/ExternalProject_libwebp.mk
@@ -48,7 +48,7 @@ $(call gb_ExternalProject_get_state_target,libwebp,build) :
 			$(if $(verbose),--disable-silent-rules,--enable-silent-rules) \
 			CXXFLAGS="$(gb_CXXFLAGS) $(if $(ENABLE_OPTIMIZED),$(gb_COMPILEROPTFLAGS),$(gb_COMPILERNOOPTFLAGS))" \
 			CPPFLAGS="$(CPPFLAGS) $(BOOST_CPPFLAGS)" \
-			$(if $(CROSS_COMPILING),--build=$(BUILD_PLATFORM) --host=$(HOST_PLATFORM)) \
+			$(gb_CONFIGURE_PLATFORMS) \
 		&& $(MAKE) \
 	)
 	$(call gb_Trace_EndRange,libwebp,EXTERNAL)