diff --git a/dll/common_includes.h b/dll/common_includes.h
index 3b43545..bf9b815 100644
--- a/dll/common_includes.h
+++ b/dll/common_includes.h
@@ -65,6 +65,18 @@
     #include <ntsecapi.h>
     #undef SystemFunction036
 
+    #ifdef _MSC_VER
+        #ifndef PRIu64
+	        #define PRIu64 "I64u"
+	    #endif
+        #ifndef PRIuPTR
+            #define PRIuPTR "Iu"
+        #endif
+        #define PRI_ZU "Iu" // Format specifier for size_t.
+    #else
+        #include <inttypes.h>
+    #endif
+
     #ifndef EMU_RELEASE_BUILD
         #define PRINT_DEBUG(a, ...) do {FILE *t = fopen("STEAM_LOG.txt", "a"); fprintf(t, "%u " a, GetCurrentThreadId(), __VA_ARGS__); fclose(t); WSASetLastError(0);} while (0)
     #endif
@@ -126,6 +138,9 @@ inline void reset_LastError()
     #include <dlfcn.h>
     #include <utime.h>
 
+    #include <inttypes.h>
+    #define PRI_ZU "zu"
+
     #define PATH_MAX_STRING_SIZE 512
 
     #ifndef EMU_RELEASE_BUILD