diff --git a/configure.ac b/configure.ac
index db33043..f0762f6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -179,6 +179,7 @@ AC_CHECK_HEADERS([\
   pwd.h \
   grp.h \
   stdio_ext.h \
+  procinfo.h \
 ])
 
 # Checks for typedefs, structures, and compiler characteristics.
diff --git a/src/progname.c b/src/progname.c
index 56d91ec..83e8652 100644
--- a/src/progname.c
+++ b/src/progname.c
@@ -35,6 +35,9 @@
 #include <errno.h>
 #include <string.h>
 #include <stdlib.h>
+#ifdef HAVE_PROCINFO_H
+#include <procinfo.h>
+#endif
 #ifdef _WIN32
 #include <Windows.h>
 #include <shlwapi.h>