diff --git a/src/conio/scale.c b/src/conio/scale.c
index 7c0cf73cf93e2da729f1fb018b48b74e09c72f50..9ea8af29c3117bbb43218281ccf079306db146eb 100644
--- a/src/conio/scale.c
+++ b/src/conio/scale.c
@@ -728,7 +728,7 @@ static
 #ifndef _MSC_VER
 __attribute__((always_inline))
 #endif
-uint32_t blend(const uint32_t c1, const uint32_t c2, const double weight)
+inline uint32_t blend(const uint32_t c1, const uint32_t c2, const double weight)
 {
 	uint8_t yuv1[4];
 	uint8_t yuv2[4];