diff --git a/ExplorerPatcher/dllmain.c b/ExplorerPatcher/dllmain.c
index fd8f5a7..4636d9f 100644
--- a/ExplorerPatcher/dllmain.c
+++ b/ExplorerPatcher/dllmain.c
@@ -23,6 +23,7 @@
 #pragma comment(lib, "Dbghelp.lib")
 #include <tlhelp32.h>
 #include <UIAutomationClient.h>
+#include <math.h>
 #ifdef _WIN64
 #include <valinet/pdb/pdb.h>
 #endif