diff --git a/src/libImaging/BcnDecode.c b/src/libImaging/BcnDecode.c
index ac81ed6df..d99b0e28e 100644
--- a/src/libImaging/BcnDecode.c
+++ b/src/libImaging/BcnDecode.c
@@ -663,7 +663,7 @@ half_to_float(UINT16 h) {
     if (o.f >= m.f) {
         o.u |= 255 << 23;
     }
-    o.u |= (h & 0x8000) << 16;
+    o.u |= (UINT32)(h & 0x8000) << 16;
     return o.f;
 }