diff --git a/linux-sdl/CMakeLists.txt b/linux-sdl/CMakeLists.txt
index e6988ff..00582e5 100644
--- a/linux-sdl/CMakeLists.txt
+++ b/linux-sdl/CMakeLists.txt
@@ -41,7 +41,7 @@ else(WITH_AGAR_STATIC)
   link_directories(${WITH_LIBAGAR_PREFIX}/lib)
 endif()
 
-set(AGAR_DEPLIBS m jpeg png z dl uim-scm uim Xinerama)
+set(AGAR_DEPLIBS m jpeg png z dl uim-scm uim Xinerama X11)
 
 
 find_package(Gettext)
diff --git a/linux-sdl/fmgen/psg.cpp b/linux-sdl/fmgen/psg.cpp
index f590cc9..cee80a5 100644
--- a/linux-sdl/fmgen/psg.cpp
+++ b/linux-sdl/fmgen/psg.cpp
@@ -150,7 +150,7 @@ void PSG::MakeEnvelopTable()
 		2,2, 2,0, 2,1, 2,3, 1,1, 1,3, 1,2, 1,0,
 	};
 	static uint8 table2[4] = {  0,  0, 31, 31 };
-	static uint8 table3[4] = {  0,  1, -1,  0 };
+	static uint8 table3[4] = {  0,  1, (uint8)-1,  0 };
 
 	if (!enveloptable[0][0])
 	{
diff --git a/linux-sdl/resource/CMakeLists.txt b/linux-sdl/resource/CMakeLists.txt
index deb1dfb..17053ee 100644
--- a/linux-sdl/resource/CMakeLists.txt
+++ b/linux-sdl/resource/CMakeLists.txt
@@ -47,7 +47,7 @@ if(ImageMagick_convert_FOUND)
      add_custom_target(${loop_var_target} ALL 
                      DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${loop_var_src}
 		     COMMAND  ${ImageMagick_convert_EXECUTABLE}
-		     ${CMAKE_CURRENT_SOURCE_DIR}/${loop_var_src}
+		     ${CMAKE_CURRENT_SOURCE_DIR}/${loop_var_src}[0]
 		     ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/${loop_var_target}
 		     )
      install(FILES ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/${loop_var_target} DESTINATION share/xm7)