diff --git a/pl/ostype/Windows.pl b/pl/ostype/Windows.pl
index 29bdc98..f79469f 100644
--- a/pl/ostype/Windows.pl
+++ b/pl/ostype/Windows.pl
@@ -4,5 +4,6 @@ $executable_suffix = ".exe";
 $math              = "";
 add_ldflags("-Wl,--out-implib,src/libMw.dll.a -static-libgcc");
 use_backend("gdi");
+add_libs("-lwinmm");
 
 1;
diff --git a/tools/genmk.pl b/tools/genmk.pl
index 6977df2..4b419b1 100755
--- a/tools/genmk.pl
+++ b/tools/genmk.pl
@@ -190,7 +190,7 @@ sub generate {
     print(OUT "src${dir}Mw.dll: " . cobjs($dir) . "\n");
     print(  OUT "	\$(LD) \$(MW_LDFLAGS) $c_dllout $dllout\$@ "
           . cobjs($dir, $prefobj)
-          . " $needlibs ${lib}opengl32.lib ${lib}gdi32.lib ${lib}user32.lib ${lib}advapi32.lib\n"
+          . " $needlibs ${lib}opengl32.lib ${lib}gdi32.lib ${lib}winmm.lib ${lib}user32.lib ${lib}advapi32.lib\n"
     );
     print(OUT "	$c_dllafter\n");
     print(OUT "\n");