diff --git a/src/libsystemd-terminal/term-wcwidth.c b/src/libsystemd-terminal/term-wcwidth.c
index 443161cfb8..df20a40451 100644
--- a/src/libsystemd-terminal/term-wcwidth.c
+++ b/src/libsystemd-terminal/term-wcwidth.c
@@ -66,8 +66,8 @@
 #include "term-internal.h"
 
 struct interval {
-  int first;
-  int last;
+  wchar_t first;
+  wchar_t last;
 };
 
 /* auxiliary function for binary search in interval table */