diff --git a/Zend/zend_strtod.c b/Zend/zend_strtod.c
index 07862f0733c..125d072a26d 100644
--- a/Zend/zend_strtod.c
+++ b/Zend/zend_strtod.c
@@ -131,6 +131,10 @@ static char *rcsid = "$OpenBSD: strtod.c,v 1.19 2004/02/03 16:52:11 drahn Exp $"
 #define u_int32_t uint32_t
 #endif
 
+#ifdef HAVE_SYS_BITYPES_H
+#include <sys/bitypes.h>
+#endif
+
 #define Long	int32_t
 #define ULong	u_int32_t
 
diff --git a/configure.in b/configure.in
index ac5a3623073..12eaef29d16 100644
--- a/configure.in
+++ b/configure.in
@@ -383,6 +383,7 @@ stdlib.h \
 string.h \
 syslog.h \
 sysexits.h \
+sys/bitypes.h \
 sys/ioctl.h \
 sys/file.h \
 sys/mman.h \