diff --git a/src/system/VectorOps.h b/src/system/VectorOps.h
index 83027ee..0c05180 100644
--- a/src/system/VectorOps.h
+++ b/src/system/VectorOps.h
@@ -38,6 +38,7 @@
 
 #ifdef HAVE_VDSP
 #include <Accelerate/Accelerate.h>
+#include <TargetConditionals.h>
 #include <alloca.h>
 #endif