diff --git a/core/CMakeLists.txt b/core/CMakeLists.txt
index 9816733c61145010c93f7930d71be8a0b3a5667c..2977ac0b3bfefc5e00a2b5cfdeabdccf4335c4ed 100644
--- a/core/CMakeLists.txt
+++ b/core/CMakeLists.txt
@@ -1,12 +1,12 @@
 #
 # libev library
 #
-add_library(ev tarantool_ev.m)
+add_library(ev tarantool_ev.c)
 
 check_c_compiler_flag ("-Wno-unused-result" gcc_has_wno_unused_result)
 
 if (gcc_has_wno_unused_result)
-    set_source_files_properties(tarantool_ev.m
+    set_source_files_properties(tarantool_ev.c
         PROPERTIES COMPILE_FLAGS "-Wno-unused-result")
 endif()
 
diff --git a/core/tarantool_ev.m b/core/tarantool_ev.c
similarity index 100%
rename from core/tarantool_ev.m
rename to core/tarantool_ev.c