diff --git a/custom/4coder_custom.cpp b/custom/4coder_custom.cpp
index 976c10da..4acd5551 100644
--- a/custom/4coder_custom.cpp
+++ b/custom/4coder_custom.cpp
@@ -6,7 +6,7 @@
 
 extern "C" b32
 get_version(i32 maj, i32 min, i32 patch){
-    printf("CUS: %d.%d.%d\n", MAJOR, MINOR, PATCH);
+    fprintf(stderr, "CUS: %d.%d.%d\n", MAJOR, MINOR, PATCH);
     return(maj == MAJOR && min == MINOR && patch == PATCH);
 }
 
diff --git a/platform_linux/linux_4ed.cpp b/platform_linux/linux_4ed.cpp
index e34176d1..3ffc17d3 100644
--- a/platform_linux/linux_4ed.cpp
+++ b/platform_linux/linux_4ed.cpp
@@ -1700,7 +1700,7 @@ main(int argc, char **argv){
             system_error_box(custom_not_found_msg);
         }
         custom.get_version = (_Get_Version_Type*)system_get_proc(custom_library, "get_version");
-        printf("VER: %d.%d.%d\n", MAJOR, MINOR, PATCH);
+        fprintf(stderr, "VER: %d.%d.%d\n", MAJOR, MINOR, PATCH);
         if (custom.get_version == 0 || custom.get_version(MAJOR, MINOR, PATCH) == 0){
             system_error_box(custom_fail_version_msg);
         }