diff --git a/cbackend.cpp b/cbackend.cpp
index 7a8f7c78..ad0ba32a 100644
--- a/cbackend.cpp
+++ b/cbackend.cpp
@@ -198,7 +198,6 @@ inline constant_iterator constant_end(const llvm::Function *F) {
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-
 // FIXME:
 namespace {
   /// TypeFinder - Walk over a module, identifying all of the types that are
@@ -1811,10 +1810,21 @@ void CWriter::printConstant(llvm::Constant *CPV, bool Static) {
     } else {
       Out << '(';
       if (CPV->getNumOperands()) {
+        // It is a kludge. It is needed because we cannot support short vectors
+        // when generating code for knl-generic in multitarget mode.
+        // Short vectors are mapped to "native" vectors and cause AVX-512 code
+        // generation in static block initialization (__vec16_* in ::init function).
+        bool isGenericKNL = g->target->getISA() == Target::GENERIC && 
+                                                   !g->target->getTreatGenericAsSmth().empty() &&
+                                                   g->mangleFunctionsWithTarget;
+        if (isGenericKNL && CPV->getOperand(0)->getType()->isVectorTy()) 
+          llvm::report_fatal_error("knl-generic-* target doesn's support short vectors");  
         Out << ' ';
         printConstant(llvm::cast<llvm::Constant>(CPV->getOperand(0)), Static);
         for (unsigned i = 1, e = CPV->getNumOperands(); i != e; ++i) {
           Out << ", ";
+          if (isGenericKNL && CPV->getOperand(i)->getType()->isVectorTy())
+            llvm::report_fatal_error("knl-generic-* target doesn's support short vectors");
           printConstant(llvm::cast<llvm::Constant>(CPV->getOperand(i)), Static);
         }
       }