diff --git a/gzdoom-vulkan.patch b/gzdoom-vulkan.patch
index 88eae79..a387e16 100644
--- a/gzdoom-vulkan.patch
+++ b/gzdoom-vulkan.patch
@@ -6,8 +6,8 @@ Use Vulkan/glslang/spirv system libraries instead of bundled code.
 ---
  CMakeLists.txt                                     |    4 +---
  src/CMakeLists.txt                                 |    2 +-
- src/common/rendering/vulkan/system/vk_builders.cpp |    3 +++
- 3 files changed, 5 insertions(+), 4 deletions(-)
+ src/common/rendering/vulkan/system/vk_builders.cpp |    4 ++++
+ 3 files changed, 6 insertions(+), 4 deletions(-)
 
 Index: gzdoom-g4.7.1/CMakeLists.txt
 ===================================================================
@@ -41,11 +41,19 @@ Index: gzdoom-g4.7.1/src/common/rendering/vulkan/system/vk_builders.cpp
 ===================================================================
 --- gzdoom-g4.7.1.orig/src/common/rendering/vulkan/system/vk_builders.cpp
 +++ gzdoom-g4.7.1/src/common/rendering/vulkan/system/vk_builders.cpp
-@@ -119,6 +119,9 @@ static const TBuiltInResource DefaultTBu
+@@ -25,6 +25,7 @@
+ #include "renderstyle.h"
+ #include <ShaderLang.h>
+ #include <GlslangToSpv.h>
++#include <glslang/build_info.h>
+ 
+ static const TBuiltInResource DefaultTBuiltInResource = {
+ 	/* .MaxLights = */ 32,
+@@ -119,6 +120,9 @@ static const TBuiltInResource DefaultTBu
  	/* .maxTaskWorkGroupSizeY_NV = */ 1,
  	/* .maxTaskWorkGroupSizeZ_NV = */ 1,
  	/* .maxMeshViewCountNV = */ 4,
-+#if GLSLANG_VERSION_MAJOR > 11 || (GLSLANG_VERSION_MAJOR == 11 && GLSLANG_VERSION_MINOR >= 9)
++#if defined(GLSLANG_VERSION_MAJOR) && GLSLANG_VERSION_MAJOR >= 11
 +	/* .maxDualSourceDrawBuffersEXT = */ 4,
 +#endif
  
diff --git a/gzdoom.spec b/gzdoom.spec
index c5833d3..f5ac6c8 100644
--- a/gzdoom.spec
+++ b/gzdoom.spec
@@ -71,6 +71,10 @@ GZDoom is a port (a modification) of the original Doom source code, featuring:
 %autosetup -n %name-g%version -p1
 rm -Rf glslang src/common/rendering/vulkan/thirdparty/vulkan
 perl -i -pe 's{__DATE__}{""}g' src/common/platform/posix/sdl/i_main.cpp
+mkdir -p extra_include/glslang
+%if 0%{?suse_version} && 0%{?suse_version} < 1550
+touch extra_include/glslang/build_info.h
+%endif
 
 %build
 # There is handcrafted assembler, which LTO does not play nice with.
@@ -82,6 +86,7 @@ perl -i -pe 's{__DATE__}{""}g' src/common/platform/posix/sdl/i_main.cpp
 export CFLAGS="%optflags -msse -msse2"
 export CXXFLAGS="%optflags -msse -msse2"
 %endif
+export CXXFLAGS="$CXXFLAGS -I$PWD/extra_include"
 %cmake -DNO_STRIP=1 \
 	-DCMAKE_SHARED_LINKER_FLAGS="" \
 	-DCMAKE_EXE_LINKER_FLAGS="" -DCMAKE_MODULE_LINKER_FLAGS="" \