diff --git a/cmake/ChooseBlas.cmake b/cmake/ChooseBlas.cmake
index 5f4af2d89c91..23e59bd5a09f 100644
--- a/cmake/ChooseBlas.cmake
+++ b/cmake/ChooseBlas.cmake
@@ -18,17 +18,17 @@
 set(BLAS "Open" CACHE STRING "Selected BLAS library")
 set_property(CACHE BLAS PROPERTY STRINGS "Atlas;Open;MKL")
 
-if(USE_MKL_IF_AVAILABLE)
-  if(NOT MKL_FOUND)
-    find_package(MKL)
-  endif()
-  if(MKL_FOUND)
-	if(USE_MKLDNN)
-      set(BLAS "open")
-    else()
-      set(BLAS "MKL")
+if(DEFINED USE_BLAS)
+    set(BLAS "${USE_BLAS}")
+else()
+    if(USE_MKL_IF_AVAILABLE)
+        if(NOT MKL_FOUND)
+            find_package(MKL)
+        endif()
+        if(MKL_FOUND)
+            set(BLAS "MKL")
+        endif()
     endif()
-  endif()
 endif()
 
 if(BLAS STREQUAL "Atlas" OR BLAS STREQUAL "atlas")