diff --git a/contrib/src/zlib/ios-fdopen.patch b/contrib/src/zlib/ios-fdopen.patch
new file mode 100644
index 0000000..772f57a
--- /dev/null
+++ b/contrib/src/zlib/ios-fdopen.patch
@@ -0,0 +1,13 @@
+diff --git a/zutil.h b/zutil.h
+index 0bc7f4e..4c0c1e8 100644
+--- a/zutil.h
++++ b/zutil.h
+@@ -137,7 +137,7 @@ extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
+ #  endif
+ #endif
+ 
+-#if defined(MACOS) || defined(TARGET_OS_MAC)
++#if defined(MACOS) || (defined(TARGET_OS_MAC) && !TARGET_OS_IPHONE)
+ #  define OS_CODE  7
+ #  ifndef Z_SOLO
+ #    if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
diff --git a/contrib/src/zlib/rules.mak b/contrib/src/zlib/rules.mak
index 4dfd37a..739a2d1 100644
--- a/contrib/src/zlib/rules.mak
+++ b/contrib/src/zlib/rules.mak
@@ -21,6 +21,7 @@ $(TARBALLS)/zlib-$(ZLIB_VERSION).tar.xz:
 zlib: zlib-$(ZLIB_VERSION).tar.xz .sum-zlib
 	$(UNPACK)
 	$(APPLY) $(SRC)/zlib/no-shared.patch
+	$(APPLY) $(SRC)/zlib/ios-fdopen.patch
 	$(MOVE)
 
 .zlib: zlib
diff --git a/contrib/src/png/ios-math-header.patch b/contrib/src/png/ios-math-header.patch
new file mode 100644
index 0000000..ba8fbd4
--- /dev/null
+++ b/contrib/src/png/ios-math-header.patch
@@ -0,0 +1,14 @@
+diff --git a/pngpriv.h b/pngpriv.h
+index 2d705b7..d34e3aa 100644
+--- a/pngpriv.h
++++ b/pngpriv.h
+@@ -518,7 +518,8 @@
+ #  include <float.h>
+ 
+ #  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
+-    defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
++    defined(THINK_C) || defined(__SC__) || \
++    (defined(TARGET_OS_MAC) && !TARGET_OS_IPHONE)
+    /* We need to check that <math.h> hasn't already been included earlier
+     * as it seems it doesn't agree with <fp.h>, yet we should really use
+     * <fp.h> if possible.
diff --git a/contrib/src/png/rules.mak b/contrib/src/png/rules.mak
index 31c6355..da2ff3c 100644
--- a/contrib/src/png/rules.mak
+++ b/contrib/src/png/rules.mak
@@ -20,6 +20,7 @@ png: libpng-$(PNG_VERSION).tar.xz .sum-png
 	$(APPLY) $(SRC)/png/winrt.patch
 	$(APPLY) $(SRC)/png/bins.patch
 	$(APPLY) $(SRC)/png/automake.patch
+	$(APPLY) $(SRC)/png/ios-math-header.patch
 	$(call pkg_static,"libpng.pc.in")
 	$(MOVE)