diff --git a/src/support_x86.cpp b/src/support_x86.cpp
index 0ab966957..bdc1293de 100644
--- a/src/support_x86.cpp
+++ b/src/support_x86.cpp
@@ -59,7 +59,7 @@ static inline bool xgetbvCheck(unsigned int bits)
 }
 
 Vc_TARGET_NO_SIMD
-bool isImplementationSupported(Implementation impl)
+bool Vc_VDECL isImplementationSupported(Implementation impl)
 {
     CpuId::init();