diff --git a/druntime/src/importc.h b/druntime/src/importc.h
index dd2cdb87b495..ab7322a7500e 100644
--- a/druntime/src/importc.h
+++ b/druntime/src/importc.h
@@ -199,6 +199,8 @@ typedef unsigned long long __uint64_t;
 typedef struct {} __SVBool_t;
 typedef struct {} __SVFloat32_t;
 typedef struct {} __SVFloat64_t;
+typedef float  __Float32x4_t __attribute__((vector_size(16)));
+typedef double __Float64x2_t __attribute__((vector_size(16)));
 #endif
 
 #endif // __linux__