diff --git a/src/debug.c b/src/debug.c
index d4fabb9e..1bd82b2f 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -41,6 +41,12 @@
 #include "bio.h"
 #endif /* HAVE_BACKTRACE */
 
+#ifdef __CYGWIN__
+#ifndef SA_ONSTACK
+#define SA_ONSTACK 0x08000000
+#endif
+#endif
+
 /* ================================= Debugging ============================== */
 
 /* Compute the sha1 of string at 's' with 'len' bytes long.
diff --git a/src/object.c b/src/object.c
index 46f1f3f8..501dcc32 100644
--- a/src/object.c
+++ b/src/object.c
@@ -32,6 +32,10 @@
 #include <math.h>
 #include <ctype.h>
 
+#ifdef __CYGWIN__
+#define strtold(a,b) ((long double)strtod((a),(b)))
+#endif
+
 robj *createObject(int type, void *ptr) {
     robj *o = zmalloc(sizeof(*o));
     o->type = type;