diff --git a/libfwupdplugin/fu-common.c b/libfwupdplugin/fu-common.c
index ec4ddb7be..a476d320c 100644
--- a/libfwupdplugin/fu-common.c
+++ b/libfwupdplugin/fu-common.c
@@ -218,7 +218,7 @@ gsize
 fu_common_align_up(gsize value, guint8 alignment)
 {
 	gsize value_new;
-	guint32 mask = 1 << alignment;
+	gsize mask = (gsize)1 << alignment;
 
 	g_return_val_if_fail(alignment <= FU_FIRMWARE_ALIGNMENT_2G, G_MAXSIZE);