diff --git a/changelog/dmd.obj_extensions.dd b/changelog/dmd.obj_extensions.dd
new file mode 100644
index 00000000000..f200382bacc
--- /dev/null
+++ b/changelog/dmd.obj_extensions.dd
@@ -0,0 +1,6 @@
+Accepting .o and .obj file extensions on all platforms
+
+Accepting .o and .obj file extensions on all platforms makes DMD behave
+the same as Clang and other modern compilers. There is no point in
+discarding *.o or *.obj depending on the current OS, as both extensions
+indicate that this is an object file.
diff --git a/compiler/src/dmd/mars.d b/compiler/src/dmd/mars.d
index 911b5405817..b911366adc6 100644
--- a/compiler/src/dmd/mars.d
+++ b/compiler/src/dmd/mars.d
@@ -1836,7 +1836,7 @@ bool createModule(const(char)* file, ref Strings libmodules, const ref Target ta
 
     /* Deduce what to do with a file based on its extension
         */
-    if (FileName.equals(ext, target.obj_ext))
+    if (FileName.equals(ext, "obj") || FileName.equals(ext, "o"))
     {
         global.params.objfiles.push(file);
         libmodules.push(file);