diff --git a/cmake/OpenCVCompilerOptions.cmake b/cmake/OpenCVCompilerOptions.cmake
index 5218b2a06..02f21f7a7 100644
--- a/cmake/OpenCVCompilerOptions.cmake
+++ b/cmake/OpenCVCompilerOptions.cmake
@@ -4,13 +4,13 @@ if (WIN32)
     foreach(flags CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_DEBUG)
       string(REPLACE "-O3" "-O2" ${flags} "${${flags}}")
     endforeach()
-  endforeach()
+  endif()
 
   if(CMAKE_COMPILER_IS_GNUC)
     foreach(flags CMAKE_C_FLAGS CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_DEBUG)
       string(REPLACE "-O3" "-O2" ${flags} "${${flags}}")
     endforeach()
-  endforeach()
+  endif()
 endif()
 
 if(MSVC)