diff --git a/lib-src/pop.c b/lib-src/pop.c
index c6deaf73a2c..42d302026ff 100644
--- a/lib-src/pop.c
+++ b/lib-src/pop.c
@@ -42,10 +42,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #endif
 #include <pop.h>
 
-#ifdef sun
-#include <malloc.h>
-#endif /* sun */
-
 #ifdef HESIOD
 #include <hesiod.h>
 /*
diff --git a/lwlib/xlwmenu.c b/lwlib/xlwmenu.c
index 61f175b3c25..7e766bb7300 100644
--- a/lwlib/xlwmenu.c
+++ b/lwlib/xlwmenu.c
@@ -28,13 +28,7 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <stdio.h>
 
 #include <sys/types.h>
-#if (defined __sun) && !(defined SUNOS41)
-#define SUNOS41
 #include <X11/Xos.h>
-#undef SUNOS41
-#else
-#include <X11/Xos.h>
-#endif
 #include <X11/IntrinsicP.h>
 #include <X11/ObjectP.h>
 #include <X11/StringDefs.h>