diff --git a/source/build/include/baselayer.h b/source/build/include/baselayer.h
index c4690d719..12fc727a6 100644
--- a/source/build/include/baselayer.h
+++ b/source/build/include/baselayer.h
@@ -24,7 +24,8 @@ EXTERN_CVAR(Bool, r_usenewaspect)
 extern int32_t newaspect_enable;
 extern int32_t r_fpgrouscan;
 extern int32_t setaspect_new_use_dimen;
-extern int32_t xres, yres, bpp, refreshfreq;
+extern int32_t xres, yres, bpp;
+extern double refreshfreq;
 
 int32_t videoCheckMode(int32_t *x, int32_t *y, int32_t c, int32_t fs, int32_t forced);
 int32_t videoSetMode(int32_t x, int32_t y, int32_t c, int32_t fs);
diff --git a/source/platform/posix/cocoa/i_main.mm b/source/platform/posix/cocoa/i_main.mm
index a6d7c15d1..7114d34ce 100644
--- a/source/platform/posix/cocoa/i_main.mm
+++ b/source/platform/posix/cocoa/i_main.mm
@@ -139,6 +139,8 @@ void I_DetectOS()
 
 FArgs* Args; // command line arguments
 
+double refreshfreq;
+bool batchrun;
 
 namespace
 {
diff --git a/source/platform/posix/sdl/sdlglvideo.cpp b/source/platform/posix/sdl/sdlglvideo.cpp
index 48dd0da35..6be854c96 100644
--- a/source/platform/posix/sdl/sdlglvideo.cpp
+++ b/source/platform/posix/sdl/sdlglvideo.cpp
@@ -111,7 +111,7 @@ CCMD(vid_list_sdl_render_drivers)
 	}
 }
 
-int refreshfreq;
+double refreshfreq;
 
 // PRIVATE DATA DEFINITIONS ------------------------------------------------
 
diff --git a/source/platform/win32/i_input.cpp b/source/platform/win32/i_input.cpp
index c3e7d65d8..1711b58dc 100644
--- a/source/platform/win32/i_input.cpp
+++ b/source/platform/win32/i_input.cpp
@@ -136,7 +136,7 @@ extern bool AppActive;
 
 int SessionState = 0;
 int BlockMouseMove; 
-int refreshfreq;
+double refreshfreq;
 
 static bool EventHandlerResultForNativeMouse;