--- src/start-stop-daemon.c
+++ src/start-stop-daemon.c
@@ -44,7 +44,7 @@
 #  define OSLinux
 #elif defined(__GNU__)
 #  define OSHURD
-#elif defined(__sparc__)
+#elif defined (__SVR4) && defined (__sun)
 #  define OSsunos
 #elif defined(OPENBSD) || defined(__OpenBSD__)
 #  define OSOpenBSD
@@ -94,6 +94,9 @@
 #if defined(OSaix)
 #include <sys/procfs.h>
 #endif
+#if defined(OSsunos)
+#include <procfs.h>
+#endif
 
 #include <errno.h>
 #include <stdio.h>
@@ -188,7 +191,7 @@
 static void do_pidfile(const char *name);
 static void do_stop(int signal_nr, int quietmode,
 		    int *n_killed, int *n_notkilled, int retry_nr);
-#if defined(OSLinux) || defined(OShpux) || defined(OSaix)
+#if defined(OSLinux) || defined(OShpux) || defined(OSaix) || defined(OSsunos)
 static int pid_is_exec(pid_t pid, const struct stat *esb);
 #endif
 
@@ -765,7 +768,7 @@
 static void
 check(pid_t pid)
 {
-#if defined(OSLinux) || defined(OShpux) || defined(OSaix)
+#if defined(OSLinux) || defined(OShpux) || defined(OSaix) || defined(OSsunos)
 	if (execname && !pid_is_exec(pid, &exec_stat))
 		return;
 #elif defined(OSHURD) || defined(OSFreeBSD) || defined(OSNetBSD) || defined(OSDarwin)
@@ -801,7 +804,7 @@
 /* WTA: this  needs to be an autoconf check for /proc/pid existance.
  */
 
-#if defined(OSLinux) || defined (OSsunos) || defined(OSfreebsd) || defined(OSaix)
+#if defined(OSLinux) || defined (OSsunos) || defined(OSfreebsd) || defined(OSaix) || defined(OSsunos)
 static void
 do_procinit(void)
 {
@@ -1069,7 +1072,7 @@
 }
 #endif /* OShpux */
 
-#if defined(OSaix)
+#if defined(OSaix) || defined(OSsunos)
 /* max possible pid (signed long) in theory:
  * 32bit: 2147483647 (10 digits)
  * 64bit: 9223372036854775807 (19 digits)
@@ -1119,7 +1122,7 @@
 	}
 	return strcmp(name, psi.pr_fname) == 0;
 }
-#endif /* OSaix */
+#endif /* OSaix || OSsunos */
 
 
 static void