diff --git a/src/cairo-cff-subset.c b/src/cairo-cff-subset.c
index bd3bfde70..49d981199 100644
--- a/src/cairo-cff-subset.c
+++ b/src/cairo-cff-subset.c
@@ -41,7 +41,7 @@
  * http://www.adobe.com/content/dam/Adobe/en/devnet/font/pdfs/5177.Type2.pdf
  */
 
-#define _BSD_SOURCE /* for snprintf(), strdup() */
+#define _DEFAULT_SOURCE /* for snprintf(), strdup() */
 #include "cairoint.h"
 
 #include "cairo-array-private.h"
diff --git a/src/cairo-ft-font.c b/src/cairo-ft-font.c
index 3b3087578..3a4663d95 100644
--- a/src/cairo-ft-font.c
+++ b/src/cairo-ft-font.c
@@ -38,7 +38,7 @@
  *      Carl Worth <cworth@cworth.org>
  */
 
-#define _BSD_SOURCE /* for strdup() */
+#define _DEFAULT_SOURCE /* for strdup() */
 #include "cairoint.h"
 
 #include "cairo-error-private.h"
diff --git a/src/cairo-output-stream.c b/src/cairo-output-stream.c
index 369a59bfb..07991703b 100644
--- a/src/cairo-output-stream.c
+++ b/src/cairo-output-stream.c
@@ -33,7 +33,7 @@
  *	Kristian Høgsberg <krh@redhat.com>
  */
 
-#define _BSD_SOURCE /* for snprintf() */
+#define _DEFAULT_SOURCE /* for snprintf() */
 #include "cairoint.h"
 
 #include "cairo-output-stream-private.h"
diff --git a/src/cairo-path-stroke-boxes.c b/src/cairo-path-stroke-boxes.c
index 7f25bf76c..fba170c63 100644
--- a/src/cairo-path-stroke-boxes.c
+++ b/src/cairo-path-stroke-boxes.c
@@ -36,7 +36,7 @@
  *	Chris Wilson <chris@chris-wilson.co.uk>
  */
 
-#define _BSD_SOURCE /* for hypot() */
+#define _DEFAULT_SOURCE /* for hypot() */
 #include "cairoint.h"
 
 #include "cairo-box-inline.h"
diff --git a/src/cairo-path-stroke-polygon.c b/src/cairo-path-stroke-polygon.c
index e5082bbec..29050fa76 100644
--- a/src/cairo-path-stroke-polygon.c
+++ b/src/cairo-path-stroke-polygon.c
@@ -37,7 +37,7 @@
  *	Chris Wilson <chris@chris-wilson.co.uk>
  */
 
-#define _BSD_SOURCE /* for hypot() */
+#define _DEFAULT_SOURCE /* for hypot() */
 #include "cairoint.h"
 
 #include "cairo-box-inline.h"
diff --git a/src/cairo-path-stroke-tristrip.c b/src/cairo-path-stroke-tristrip.c
index 6ce4131cc..317876560 100644
--- a/src/cairo-path-stroke-tristrip.c
+++ b/src/cairo-path-stroke-tristrip.c
@@ -37,7 +37,7 @@
  *	Chris Wilson <chris@chris-wilson.co.uk>
  */
 
-#define _BSD_SOURCE /* for hypot() */
+#define _DEFAULT_SOURCE /* for hypot() */
 #include "cairoint.h"
 
 #include "cairo-box-inline.h"
diff --git a/src/cairo-path-stroke.c b/src/cairo-path-stroke.c
index 4d4ede813..64cec8f27 100644
--- a/src/cairo-path-stroke.c
+++ b/src/cairo-path-stroke.c
@@ -36,7 +36,7 @@
  *	Chris Wilson <chris@chris-wilson.co.uk>
  */
 
-#define _BSD_SOURCE /* for hypot() */
+#define _DEFAULT_SOURCE /* for hypot() */
 #include "cairoint.h"
 
 #include "cairo-box-inline.h"
diff --git a/src/cairo-pdf-surface.c b/src/cairo-pdf-surface.c
index c258b7381..9e1547eac 100644
--- a/src/cairo-pdf-surface.c
+++ b/src/cairo-pdf-surface.c
@@ -39,7 +39,7 @@
  *	Adrian Johnson <ajohnson@redneon.com>
  */
 
-#define _BSD_SOURCE /* for snprintf() */
+#define _DEFAULT_SOURCE /* for snprintf() */
 #include "cairoint.h"
 
 #include "cairo-pdf.h"
diff --git a/src/cairo-ps-surface.c b/src/cairo-ps-surface.c
index 1e020c056..e34f656cf 100644
--- a/src/cairo-ps-surface.c
+++ b/src/cairo-ps-surface.c
@@ -53,7 +53,7 @@
  *   2. Using gs to do PS -> PDF and PDF -> PS will always work well.
  */
 
-#define _BSD_SOURCE /* for ctime_r(), snprintf(), strdup() */
+#define _DEFAULT_SOURCE /* for ctime_r(), snprintf(), strdup() */
 #include "cairoint.h"
 
 #include "cairo-ps.h"
diff --git a/src/cairo-scaled-font-subsets.c b/src/cairo-scaled-font-subsets.c
index bf05fbd55..a239ec9b3 100644
--- a/src/cairo-scaled-font-subsets.c
+++ b/src/cairo-scaled-font-subsets.c
@@ -40,7 +40,7 @@
  *	Adrian Johnson <ajohnson@redneon.com>
  */
 
-#define _BSD_SOURCE /* for snprintf(), strdup() */
+#define _DEFAULT_SOURCE /* for snprintf(), strdup() */
 #include "cairoint.h"
 #include "cairo-error-private.h"
 
diff --git a/src/cairo-svg-surface.c b/src/cairo-svg-surface.c
index 2a020c017..e04eccc0b 100644
--- a/src/cairo-svg-surface.c
+++ b/src/cairo-svg-surface.c
@@ -39,7 +39,7 @@
  *	Carl Worth <cworth@cworth.org>
  */
 
-#define _BSD_SOURCE /* for snprintf() */
+#define _DEFAULT_SOURCE /* for snprintf() */
 #include "cairoint.h"
 
 #include "cairo-svg.h"
diff --git a/src/cairo-toy-font-face.c b/src/cairo-toy-font-face.c
index 4fe94ab09..516f39195 100644
--- a/src/cairo-toy-font-face.c
+++ b/src/cairo-toy-font-face.c
@@ -39,7 +39,7 @@
  *      Behdad Esfahbod <behdad@behdad.org>
  */
 
-#define _BSD_SOURCE /* for strdup() */
+#define _DEFAULT_SOURCE /* for strdup() */
 #include "cairoint.h"
 #include "cairo-error-private.h"
 
diff --git a/src/cairo-truetype-subset.c b/src/cairo-truetype-subset.c
index 62902cf7a..86593bc73 100644
--- a/src/cairo-truetype-subset.c
+++ b/src/cairo-truetype-subset.c
@@ -40,7 +40,7 @@
  * http://www.microsoft.com/typography/specs/default.htm
  */
 
-#define _BSD_SOURCE /* for snprintf(), strdup() */
+#define _DEFAULT_SOURCE /* for snprintf(), strdup() */
 #include "cairoint.h"
 
 #include "cairo-array-private.h"
diff --git a/src/cairo-type1-fallback.c b/src/cairo-type1-fallback.c
index 4a657413e..c8e7e908b 100644
--- a/src/cairo-type1-fallback.c
+++ b/src/cairo-type1-fallback.c
@@ -33,7 +33,7 @@
  *	Adrian Johnson <ajohnson@redneon.com>
  */
 
-#define _BSD_SOURCE /* for snprintf(), strdup() */
+#define _DEFAULT_SOURCE /* for snprintf(), strdup() */
 #include "cairoint.h"
 
 #include "cairo-array-private.h"
diff --git a/src/cairo-type1-subset.c b/src/cairo-type1-subset.c
index 16f821d9c..810dc9f74 100644
--- a/src/cairo-type1-subset.c
+++ b/src/cairo-type1-subset.c
@@ -40,7 +40,7 @@
  */
 
 
-#define _BSD_SOURCE /* for snprintf(), strdup() */
+#define _DEFAULT_SOURCE /* for snprintf(), strdup() */
 #include "cairoint.h"
 
 #include "cairo-array-private.h"