# See https://bugs.gentoo.org/628688 for further info and
# development discussion about this patch.
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -100,6 +100,14 @@ FIND_PACKAGE(ImageMagick REQUIRED)
 FIND_PACKAGE(ImageMagick COMPONENTS Magick++)
 FIND_PACKAGE(ImageMagick COMPONENTS MagickWand)
 FIND_PACKAGE(ImageMagick COMPONENTS MagickCore)
+if (NOT ImageMagick_MagickCore_FOUND)
+    set(ImageMagick_INCLUDE_DIRS "GENTOO_INCLUDE/GraphicsMagick")
+    set(ImageMagick_Magick++_INCLUDE_DIRS "GENTOO_INCLUDE/GraphicsMagick/Magick++")
+    set(ImageMagick_MagickCore_INCLUDE_DIRS "")
+    set(ImageMagick_LIBRARY "GENTOO_LIB/libGraphicsMagick.so")
+    set(ImageMagick_Magick++_LIBRARY "GENTOO_LIB/libGraphicsMagick++.so")
+    set(ImageMagick_MagickCore_LIBRARY "")
+endif ()
 
 INCLUDE_DIRECTORIES(${Qt5Core_INCLUDE_DIRS})
 INCLUDE_DIRECTORIES(${Qt5Gui_INCLUDE_DIRS})
--- a/src/converter.cpp
+++ b/src/converter.cpp
@@ -254,8 +254,14 @@ bool Converter::writeImage(Image &my_image, const QString &format, const int &qu
 
     error_status = "";
 
+/*  Workaround to compile with GraphicsMagick:
+    GraphicsMagick "MagickLibVersion" is greater that 0x100000
+    e.g. GraphicsMagick-1.3.25 has "MagickLibVersion=0x181501"
+    or GraphicsMagick-1.3.26 has "MagickLibVersion=0x191600" */
 #if MagickLibVersion < 0x700
     hasTransparency = my_image.matte();
+#elif MagickLibVersion > 0x100000
+    hasTransparency = my_image.matte();
 #else
     hasTransparency = my_image.alpha();
 #endif
--- a/src/globals.h
+++ b/src/globals.h
@@ -32,8 +32,14 @@
 using namespace Magick;
 using namespace std;
 
+/*  Workaround to compile with GraphicsMagick:
+    GraphicsMagick "MagickLibVersion" is greater that 0x100000
+    e.g. GraphicsMagick-1.3.25 has "MagickLibVersion=0x181501"
+    or GraphicsMagick-1.3.26 has "MagickLibVersion=0x191600" */
 #if MagickLibVersion < 0x700
     typedef FilterTypes IMFilterType;
+#elif MagickLibVersion > 0x100000
+    typedef FilterTypes IMFilterType;
 #else
     typedef FilterType IMFilterType;
 #endif