diff --git a/modules/cblas.cmake b/modules/cblas.cmake
index e2d467b..756614a 100644
--- a/modules/cblas.cmake
+++ b/modules/cblas.cmake
@@ -22,8 +22,8 @@ if(ENABLE_CBLAS)
     include(find_include_files)
 
     set(CBLAS_FOUND FALSE)
-    set(CBLAS_LIBRARIES "undefined")
-    set(CBLAS_INCLUDE_DIR "undefined")
+    set(CBLAS_LIBRARIES "NOTFOUND")
+    set(CBLAS_INCLUDE_DIR "NOTFOUND")
 
     if(APPLE)
         _find_library(Accelerate cblas_dgemm CBLAS_LIBRARIES)
@@ -33,8 +33,8 @@ if(ENABLE_CBLAS)
         _find_include_dir(cblas.h /usr CBLAS_INCLUDE_DIR)
     endif()
 
-    if(NOT "${CBLAS_LIBRARIES}" STREQUAL "undefined")
-        if(NOT "${CBLAS_INCLUDE_DIR}" STREQUAL "undefined")
+    if(NOT "${CBLAS_LIBRARIES}" STREQUAL "NOTFOUND")
+        if(NOT "${CBLAS_INCLUDE_DIR}" STREQUAL "NOTFOUND")
             set(CBLAS_FOUND TRUE)
         endif()
     endif()
diff --git a/modules/lapacke.cmake b/modules/lapacke.cmake
index 38580e8..37be36e 100644
--- a/modules/lapacke.cmake
+++ b/modules/lapacke.cmake
@@ -22,8 +22,8 @@ if(ENABLE_LAPACKE)
     include(find_include_files)
 
     set(LAPACKE_FOUND FALSE)
-    set(LAPACKE_LIBRARIES "undefined")
-    set(LAPACKE_INCLUDE_DIR "undefined")
+    set(LAPACKE_LIBRARIES "NOTFOUND")
+    set(LAPACKE_INCLUDE_DIR "NOTFOUND")
 
 #   if(APPLE)
 #       _find_library(Accelerate cblas_dgemm LAPACKE_LIBRARIES)
@@ -33,8 +33,8 @@ if(ENABLE_LAPACKE)
         _find_include_dir(lapacke.h /usr LAPACKE_INCLUDE_DIR)
 #   endif()
 
-    if(NOT "${LAPACKE_LIBRARIES}" STREQUAL "undefined")
-        if(NOT "${LAPACKE_INCLUDE_DIR}" STREQUAL "undefined")
+    if(NOT "${LAPACKE_LIBRARIES}" STREQUAL "NOTFOUND")
+        if(NOT "${LAPACKE_INCLUDE_DIR}" STREQUAL "NOTFOUND")
             set(LAPACKE_FOUND TRUE)
         endif()
     endif()