diff --git a/CMakeLists.txt b/CMakeLists.txt
index 05f03626e7..16cf914e58 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -127,7 +127,7 @@ if(CMAKE_Fortran_COMPILER_ID STREQUAL GNU)
   endif()
   if(optimize)
     list(APPEND f90flags -O3 -flto -fuse-linker-plugin)
-    list(APPEND cflags -O3 -flto -fuse-linker-plugin)
+    list(APPEND cflags -O3)
   endif()
   if(openmp)
     list(APPEND f90flags -fopenmp)