diff --git a/libopenjpeg/int.h b/libopenjpeg/int.h
index 4e5fe08e..a5563f46 100644
--- a/libopenjpeg/int.h
+++ b/libopenjpeg/int.h
@@ -91,7 +91,7 @@ Divide an integer by a power of 2 and round upwards
 @return Returns a divided by 2^b
 */
 static INLINE int int_ceildivpow2(int a, int b) {
-	return (a + (1 << b) - 1) >> b;
+    return (int)((a + (int64_t)(1 << b) - 1) >> b);
 }
 /**
 Divide an integer by a power of 2 and round downwards