diff --git a/include/globals.h b/include/globals.h
index 65a25855eb..afb874c64e 100644
--- a/include/globals.h
+++ b/include/globals.h
@@ -27,7 +27,6 @@ extern _X_EXPORT int defaultColorVisualClass;
 extern _X_EXPORT int GrabInProgress;
 extern _X_EXPORT char *SeatId;
 extern _X_EXPORT char *ConnectionInfo;
-extern _X_EXPORT sig_atomic_t inSignalContext;
 
 #ifdef XINERAMA
 extern _X_EXPORT Bool PanoramiXExtensionDisabledHack;
diff --git a/os/osdep.h b/os/osdep.h
index b4a393e055..c8c733aa52 100644
--- a/os/osdep.h
+++ b/os/osdep.h
@@ -51,6 +51,7 @@ SOFTWARE.
 #include <X11/Xdefs.h>
 
 #include <limits.h>
+#include <signal.h>
 #include <stddef.h>
 #include <X11/Xos.h>
 #include <X11/Xmd.h>
@@ -241,4 +242,6 @@ enum ExitCode {
     EXIT_ERR_DRIVERS = 3,
 };
 
+extern sig_atomic_t inSignalContext;
+
 #endif                          /* _OSDEP_H_ */