--- redshift-1.6/configure.ac	2010-10-17 17:27:35.000000000 -0400
+++ redshift-1.6/configure.ac	2011-04-25 11:15:53.114328593 -0400
@@ -153,7 +153,7 @@
 
 
 # Checks for header files.
-AC_CHECK_HEADERS([locale.h stdint.h stdlib.h string.h unistd.h sys/signal.h])
+AC_CHECK_HEADERS([locale.h stdint.h stdlib.h string.h unistd.h signal.h])
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_TYPE_UINT16_T
--- redshift-1.6/src/redshift.c	2011-04-25 11:12:35.752264947 -0400
+++ redshift-1.6/src/redshift.c	2011-04-25 11:14:44.496435502 -0400
@@ -30,8 +30,8 @@
 #include <locale.h>
 #include <errno.h>
 
-#ifdef HAVE_SYS_SIGNAL_H
-# include <sys/signal.h>
+#ifdef HAVE_SIGNAL_H
+# include <signal.h>
 #endif
 
 #ifdef ENABLE_NLS
@@ -206,7 +206,7 @@
 } program_mode_t;
 
 
-#ifdef HAVE_SYS_SIGNAL_H
+#ifdef HAVE_SIGNAL_H
 
 static volatile sig_atomic_t exiting = 0;
 static volatile sig_atomic_t disable = 0;
@@ -225,12 +225,12 @@
 	disable = 1;
 }
 
-#else /* ! HAVE_SYS_SIGNAL_H */
+#else /* ! HAVE_SIGNAL_H */
 
 static int exiting = 0;
 static int disable = 0;
 
-#endif /* ! HAVE_SYS_SIGNAL_H */
+#endif /* ! HAVE_SIGNAL_H */
 
 
 /* Calculate color temperature for the specified solar elevation. */
@@ -1017,7 +1017,7 @@
 		   will be exactly 6500K. */
 		float adjustment_alpha = 0.0;
 
-#ifdef HAVE_SYS_SIGNAL_H
+#ifdef HAVE_SIGNAL_H
 		struct sigaction sigact;
 		sigset_t sigset;
 		sigemptyset(&sigset);
@@ -1034,7 +1034,7 @@
 		sigact.sa_mask = sigset;
 		sigact.sa_flags = 0;
 		sigaction(SIGUSR1, &sigact, NULL);
-#endif /* HAVE_SYS_SIGNAL_H */
+#endif /* HAVE_SIGNAL_H */
 
 		/* Continously adjust color temperature */
 		int done = 0;