diff --git a/builtins/target-avx512-common.ll b/builtins/target-avx512-common.ll
index c26f54de..02acaafc 100644
--- a/builtins/target-avx512-common.ll
+++ b/builtins/target-avx512-common.ll
@@ -827,3 +827,5 @@ declare_nvptx()
 rsqrtd_decl()
 rcpd_decl()
 
+transcendetals_decl()
+trigonometry_decl()
diff --git a/ispc.cpp b/ispc.cpp
index d4252eb0..9c7f4b54 100644
--- a/ispc.cpp
+++ b/ispc.cpp
@@ -897,7 +897,7 @@ Target::Target(const char *arch, const char *cpu, const char *isa, bool pic, boo
         // For MIC it is set to true due to performance reasons. The option should be tested.
         this->m_hasTrigonometry = false;
         this->m_hasRsqrtd = this->m_hasRcpd = false;
-        this->m_hasVecPrefetch = true;
+        this->m_hasVecPrefetch = false;
         CPUfromISA = CPU_KNL;
     }
 #endif