diff --git a/src/wxxt/contrib/xpm/lib/CrBufFrI.c b/src/wxxt/contrib/xpm/lib/CrBufFrI.c
index e7d5da4fa4..3399ba5189 100644
--- a/src/wxxt/contrib/xpm/lib/CrBufFrI.c
+++ b/src/wxxt/contrib/xpm/lib/CrBufFrI.c
@@ -36,7 +36,7 @@
 \*****************************************************************************/
 
 #include "xpmP.h"
-#if defined(SYSV) || defined(SVR4) || defined(VMS)
+#if defined(SYSV) || defined(SVR4) || defined(VMS) || defined(__GNUC__)
 #include <string.h>
 #else
 #include <strings.h>
diff --git a/src/wxxt/contrib/xpm/lib/CrDatFrI.c b/src/wxxt/contrib/xpm/lib/CrDatFrI.c
index e97fed715e..ca898d120a 100644
--- a/src/wxxt/contrib/xpm/lib/CrDatFrI.c
+++ b/src/wxxt/contrib/xpm/lib/CrDatFrI.c
@@ -33,7 +33,7 @@
 \*****************************************************************************/
 
 #include "xpmP.h"
-#if defined(SYSV) || defined(SVR4) || defined(VMS)
+#if defined(SYSV) || defined(SVR4) || defined(VMS) || defined(__GNUC__)
 #include <string.h>
 #else
 #include <strings.h>
diff --git a/src/wxxt/contrib/xpm/lib/WrFFrBuf.c b/src/wxxt/contrib/xpm/lib/WrFFrBuf.c
index 5f47f52f12..d758232745 100644
--- a/src/wxxt/contrib/xpm/lib/WrFFrBuf.c
+++ b/src/wxxt/contrib/xpm/lib/WrFFrBuf.c
@@ -33,6 +33,11 @@
 \*****************************************************************************/
 
 #include "xpmP.h"
+#if defined(SYSV) || defined(SVR4) || defined(VMS) || defined(__GNUC__)
+#include <string.h>
+#else
+#include <strings.h>
+#endif
 
 int
 XpmWriteFileFromBuffer(filename, buffer)
diff --git a/src/wxxt/contrib/xpm/lib/WrFFrI.c b/src/wxxt/contrib/xpm/lib/WrFFrI.c
index 3d6f8a1cd9..7a004d9dce 100644
--- a/src/wxxt/contrib/xpm/lib/WrFFrI.c
+++ b/src/wxxt/contrib/xpm/lib/WrFFrI.c
@@ -33,6 +33,11 @@
 \*****************************************************************************/
 
 #include "xpmP.h"
+#if defined(SYSV) || defined(SVR4) || defined(VMS) || defined(__GNUC__)
+#include <string.h>
+#else
+#include <strings.h>
+#endif
 
 LFUNC(WriteFile, int, (FILE *file, XpmImage *image, char *name,
 		       XpmInfo *info));
diff --git a/src/wxxt/contrib/xpm/lib/create.c b/src/wxxt/contrib/xpm/lib/create.c
index 2b30f9df37..ced1e0a254 100644
--- a/src/wxxt/contrib/xpm/lib/create.c
+++ b/src/wxxt/contrib/xpm/lib/create.c
@@ -40,6 +40,11 @@
 
 #include "xpmP.h"
 #include <ctype.h>
+#if defined(SYSV) || defined(SVR4) || defined(VMS) || defined(__GNUC__)
+#include <string.h>
+#else
+#include <strings.h>
+#endif
 
 LFUNC(xpmVisualType, int, (Visual *visual));
 
diff --git a/src/wxxt/contrib/xpm/lib/data.c b/src/wxxt/contrib/xpm/lib/data.c
index 1667b485b1..351068a8e0 100644
--- a/src/wxxt/contrib/xpm/lib/data.c
+++ b/src/wxxt/contrib/xpm/lib/data.c
@@ -39,6 +39,11 @@ static char *RCS_Version = "$XpmVersion: 3.4g $";
 
 #include "xpmP.h"
 #include <ctype.h>
+#if defined(SYSV) || defined(SVR4) || defined(VMS) || defined(__GNUC__)
+#include <string.h>
+#else
+#include <strings.h>
+#endif
 
 
 LFUNC(ParseComment, int, (xpmData * mdata));
diff --git a/src/wxxt/contrib/xpm/lib/hashtab.c b/src/wxxt/contrib/xpm/lib/hashtab.c
index 790203bfe8..4d76aa5aa3 100644
--- a/src/wxxt/contrib/xpm/lib/hashtab.c
+++ b/src/wxxt/contrib/xpm/lib/hashtab.c
@@ -34,6 +34,11 @@
 \*****************************************************************************/
 
 #include "xpmP.h"
+#if defined(SYSV) || defined(SVR4) || defined(VMS) || defined(__GNUC__)
+#include <string.h>
+#else
+#include <strings.h>
+#endif
 
 LFUNC(AtomMake, xpmHashAtom, (char *name, void *data));
 LFUNC(HashTableGrows, int, (xpmHashTable * table));
diff --git a/src/wxxt/contrib/xpm/lib/parse.c b/src/wxxt/contrib/xpm/lib/parse.c
index 3612313189..d847365e5e 100644
--- a/src/wxxt/contrib/xpm/lib/parse.c
+++ b/src/wxxt/contrib/xpm/lib/parse.c
@@ -40,6 +40,11 @@
 
 #include "xpmP.h"
 #include <ctype.h>
+#if defined(SYSV) || defined(SVR4) || defined(VMS) || defined(__GNUC__)
+#include <string.h>
+#else
+#include <strings.h>
+#endif
 
 LFUNC(ParseValues, int, (xpmData *data, unsigned int *width,
 			 unsigned int *height, unsigned int *ncolors,
diff --git a/src/wxxt/contrib/xpm/lib/rgb.c b/src/wxxt/contrib/xpm/lib/rgb.c
index 114b30f47d..0984b27764 100644
--- a/src/wxxt/contrib/xpm/lib/rgb.c
+++ b/src/wxxt/contrib/xpm/lib/rgb.c
@@ -44,7 +44,7 @@
 
 #include "xpmP.h"
 #include <ctype.h>
-#if defined(SYSV) || defined(SVR4) || defined(VMS)
+#if defined(SYSV) || defined(SVR4) || defined(VMS) || defined(__GNUC__)
 #include <string.h>
 #else
 #include <strings.h>