diff --git a/Makefile b/Makefile
index 0c058759..3ce617c1 100644
--- a/Makefile
+++ b/Makefile
@@ -124,7 +124,7 @@ LRESRC = plink.$(RES)
 
 LIBS1 = advapi32.lib user32.lib gdi32.lib
 LIBS2 = comctl32.lib comdlg32.lib
-LIBS3 = shell32.lib
+LIBS3 = shell32.lib winmm.lib
 SOCK1 = wsock32.lib
 SOCK2 = ws2_32.lib
 
diff --git a/window.c b/window.c
index 29828965..865ff805 100644
--- a/window.c
+++ b/window.c
@@ -1,6 +1,7 @@
 #include <windows.h>
 #include <imm.h>
 #include <commctrl.h>
+#include <mmsystem.h>
 #ifndef AUTO_WINSOCK
 #ifdef WINSOCK_TWO
 #include <winsock2.h>