diff --git a/extras/globbing.h b/extras/globbing.h
index 795f7f9..4cfe25d 100644
--- a/extras/globbing.h
+++ b/extras/globbing.h
@@ -1,3 +1,6 @@
+#ifndef INCL_PHYSFSEXT_GLOBBING_H
+#define INCL_PHYSFSEXT_GLOBBING_H
+
 /** \file globbing.h */
 
 #include "physfs.h"
@@ -32,6 +35,9 @@
  *  \author Ryan C. Gordon.
  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 /**
  * \fn char **PHYSFS_enumerateFilesWildcard(const char *dir, const char *wildcard, int caseSensitive)
@@ -149,5 +155,11 @@ PHYSFS_DECL void PHYSFSEXT_enumerateFilesCallbackWildcard(const char *dir,
                                               PHYSFS_EnumFilesCallback c,
                                               void *d);
 
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* include-once blocker. */
+
 /* end of globbing.h ... */
 
diff --git a/extras/ignorecase.h b/extras/ignorecase.h
index 1d98355..f118863 100644
--- a/extras/ignorecase.h
+++ b/extras/ignorecase.h
@@ -1,3 +1,6 @@
+#ifndef INCL_PHYSFSEXT_IGNORECASE_H
+#define INCL_PHYSFSEXT_IGNORECASE_H
+
 /** \file ignorecase.h */
 
 /**
@@ -44,6 +47,9 @@
  *  \author Ryan C. Gordon.
  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 /**
  * \fn int PHYSFSEXT_locateCorrectCase(char *buf)
@@ -71,5 +77,11 @@
  */
 int PHYSFSEXT_locateCorrectCase(char *buf);
 
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* include-once blocker. */
+
 /* end of ignorecase.h ... */