diff --git a/cmake/kokkoskernels_tpls.cmake b/cmake/kokkoskernels_tpls.cmake
index c8d9b6aa5a..50b75ef0d5 100644
--- a/cmake/kokkoskernels_tpls.cmake
+++ b/cmake/kokkoskernels_tpls.cmake
@@ -388,7 +388,7 @@ KOKKOSKERNELS_ADD_TPL_OPTION(MAGMA    OFF "Whether to enable MAGMA")
 
 # Set F77_BLAS_MANGLE macro based on Fortran-C interface (unless already set
 # by Trilinos or user)
-IF ("${F77_BLAS_MANGLE STREQUAL}" "")
+IF (F77_BLAS_MANGLE STREQUAL "")
   IF (KOKKOSKERNELS_ENABLE_TPL_BLAS OR KOKKOSKERNELS_ENABLE_TPL_MKL OR KOKKOSKERNELS_ENABLE_TPL_MAGMA)
     ENABLE_LANGUAGE(C)
     ENABLE_LANGUAGE(Fortran)