diff --git a/include/stdio.h b/include/stdio.h
index 7c4f9ee4..afadd912 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -49,6 +49,7 @@ extern "C" {
 
 typedef union _G_fpos64_t {
 	char __opaque[16];
+	long long __lldata;
 	double __align;
 } fpos_t;
 
diff --git a/src/stdio/fgetpos.c b/src/stdio/fgetpos.c
index c3fa0eb0..6eb361e1 100644
--- a/src/stdio/fgetpos.c
+++ b/src/stdio/fgetpos.c
@@ -4,7 +4,7 @@ int fgetpos(FILE *restrict f, fpos_t *restrict pos)
 {
 	off_t off = __ftello(f);
 	if (off < 0) return -1;
-	*(off_t *)pos = off;
+	*(long long *)pos = off;
 	return 0;
 }
 
diff --git a/src/stdio/fsetpos.c b/src/stdio/fsetpos.c
index 5d76c8cd..6310424e 100644
--- a/src/stdio/fsetpos.c
+++ b/src/stdio/fsetpos.c
@@ -2,7 +2,7 @@
 
 int fsetpos(FILE *f, const fpos_t *pos)
 {
-	return __fseeko(f, *(const off_t *)pos, SEEK_SET);
+	return __fseeko(f, *(const long long *)pos, SEEK_SET);
 }
 
 LFS64(fsetpos);