diff --git a/academic/celestia/celestia-1.6.1-libpng15.patch b/academic/celestia/celestia-1.6.1-libpng15.patch
new file mode 100644
index 0000000000..5dffbab246
--- /dev/null
+++ b/academic/celestia/celestia-1.6.1-libpng15.patch
@@ -0,0 +1,14 @@
+imagecapture.cpp:184:40: error: ‘Z_BEST_COMPRESSION’ was not declared in this scope
+
+--- src/celestia/imagecapture.cpp
++++ src/celestia/imagecapture.cpp
+@@ -31,6 +31,9 @@
+ #include "png.h"
+ #endif
+ 
++// Z_BEST_COMPRESSION
++#include <zlib.h>
++
+ // Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng
+ #ifndef png_jmpbuf
+ #define png_jmpbuf(png_ptr) png_ptr->jmpbuf
diff --git a/academic/celestia/celestia-1.6.1-libpng16.patch b/academic/celestia/celestia-1.6.1-libpng16.patch
new file mode 100644
index 0000000000..78911cb557
--- /dev/null
+++ b/academic/celestia/celestia-1.6.1-libpng16.patch
@@ -0,0 +1,25 @@
+image.cpp:530:61: error: ‘memcpy’ was not declared in this scope
+
+https://bugs.gentoo.org/show_bug.cgi?id=464764
+
+Patch written by Lars Wendler <polynomial-c@gentoo.org>
+--- a/celestia/src/celengine/image.cpp
++++ b/celestia/src/celengine/image.cpp
+@@ -42,6 +42,7 @@ extern "C" {
+ #include "jpeglib.h"
+ #else
+ #include <cstdio>
++#include <string.h>
+ #include <jpeglib.h>
+ #endif
+ }
+--- a/celestia/src/celengine/texture.cpp
++++ b/celestia/src/celengine/texture.cpp
+@@ -28,6 +28,7 @@
+ #include <cstdlib>
+ #include <cstdio>
+ #include <cassert>
++#include <string.h>
+ 
+ #ifndef _WIN32
+ #ifndef TARGET_OS_MAC
diff --git a/academic/celestia/celestia.SlackBuild b/academic/celestia/celestia.SlackBuild
index 1802c08d6d..4faaed06ae 100644
--- a/academic/celestia/celestia.SlackBuild
+++ b/academic/celestia/celestia.SlackBuild
@@ -72,9 +72,13 @@ find -L . \
 # Note that the kde frontend will only build with kde3
 FRONTEND=${FRONTEND:-gtk}
 
-# Fix incomatibility with gcc 4.7
+# Fix incompatibility with gcc 4.7
 patch -p1 -i $CWD/celestia-1.6.1-gcc47.patch
 
+# Fix libpng incompatibilities (thanks to Arch Linux)
+patch -p0 -i $CWD/celestia-1.6.1-libpng15.patch
+patch -p2 -i $CWD/celestia-1.6.1-libpng16.patch
+
 CFLAGS="$SLKCFLAGS" \
 CXXFLAGS="$SLKCFLAGS" \
 ./configure \