diff --git a/CMakeLists.txt b/CMakeLists.txt
index 532353a8b..cbddde251 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -130,6 +130,7 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror=delete-incomplete")
 
 # Do net set math errno, as we never check its value.
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-math-errno")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-math-errno")
 
 # Special treatment for x87 and x86-32 SSE (see GitHub issue #4324)
 include(FindX87Math)