diff --git a/libfixmath/fixmath/fix16.h b/libfixmath/fixmath/fix16.h
index a2a49b1..d5acb81 100755
--- a/libfixmath/fixmath/fix16.h
+++ b/libfixmath/fixmath/fix16.h
@@ -42,6 +42,12 @@ static inline fix16_t fix16_from_int(int a) { return a * fix16_one; }
 static inline float fix16_to_float(fix16_t a) { return (float)a / fix16_one; }
 static inline double fix16_to_dbl(fix16_t a) { return (double)a / fix16_one; }
 
+/* Static inline functions cannot be used to determine compile-time values,
+ * so use this expression instead if needed. */
+#define FIX16_C_FROM_INT(a) ((a) * fix16_one)
+#define FIX16_C_FROM_FLOAT(a) (((float)(a) * fix16_one) >= 0 ? \
+    (((float)(a) * fix16_one)) + 0.5f : ((float)(a) * fix16_one) - 0.5f)
+
 static inline int fix16_to_int(fix16_t a)
 {
 #ifdef FIXMATH_NO_ROUNDING