diff --git a/cmake/SundialsSetupCompilers.cmake b/cmake/SundialsSetupCompilers.cmake
index 366af04a77..a3810541d0 100644
--- a/cmake/SundialsSetupCompilers.cmake
+++ b/cmake/SundialsSetupCompilers.cmake
@@ -76,8 +76,8 @@ endif()
 if(ENABLE_ALL_WARNINGS)
   message(STATUS "Enabling all compiler warnings")
 
-  set(CMAKE_C_FLAGS "-Wall -Wpedantic -Wextra -Wmissing-declarations -Wcast-qual -Wdouble-promotion -Wno-unused-parameter -Wno-unused-function ${CMAKE_C_FLAGS}")
-  set(CMAKE_CXX_FLAGS "-Wall -Wpedantic -Wextra -Wmissing-declarations -Wcast-qual -Wdouble-promotion -Wno-unused-parameter -Wno-unused-function ${CMAKE_CXX_FLAGS}")
+  set(CMAKE_C_FLAGS "-Wall -Wpedantic -Wextra -Wshadow -Wmissing-declarations -Wcast-qual -Wdouble-promotion -Wno-unused-parameter -Wno-unused-function ${CMAKE_C_FLAGS}")
+  set(CMAKE_CXX_FLAGS "-Wall -Wpedantic -Wextra -Wshadow -Wmissing-declarations -Wcast-qual -Wdouble-promotion -Wno-unused-parameter -Wno-unused-function ${CMAKE_CXX_FLAGS}")
   set(CMAKE_Fortran_FLAGS "-Wall -Wpedantic -Wno-unused-dummy-argument -Wno-c-binding-type -ffpe-summary=none ${CMAKE_Fortran_FLAGS}")
 endif()