diff --git a/gzdoom-asmjit.patch b/gzdoom-asmjit.patch
new file mode 100644
index 0000000..a5f4960
--- /dev/null
+++ b/gzdoom-asmjit.patch
@@ -0,0 +1,16 @@
+---
+ libraries/asmjit/CMakeLists.txt |    1 +
+ 1 file changed, 1 insertion(+)
+
+Index: gzdoom-g4.2.1/libraries/asmjit/CMakeLists.txt
+===================================================================
+--- gzdoom-g4.2.1.orig/libraries/asmjit/CMakeLists.txt
++++ gzdoom-g4.2.1/libraries/asmjit/CMakeLists.txt
+@@ -140,6 +140,7 @@ endforeach()
+ 
+ add_library(${ASMJITNAME} STATIC ${ASMJIT_SRCS})
+ set_target_properties(${ASMJITNAME} PROPERTIES OUTPUT_NAME asmjit)
++target_link_libraries(${ASMJITNAME} rt)
+ 
+ if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL)
+ 	install(TARGETS ${ASMJITNAME}
diff --git a/gzdoom.changes b/gzdoom.changes
index 536c959..d878a47 100644
--- a/gzdoom.changes
+++ b/gzdoom.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue Oct  1 06:23:02 UTC 2019 - Jan Engelhardt <jengelh@inai.de>
+
+- Add gzdoom-asmjit.patch.
+
 -------------------------------------------------------------------
 Fri Sep 13 11:39:15 UTC 2019 - Jan Engelhardt <jengelh@inai.de>
 
diff --git a/gzdoom.spec b/gzdoom.spec
index 1f33a78..2257f81 100644
--- a/gzdoom.spec
+++ b/gzdoom.spec
@@ -29,6 +29,7 @@ Source:         https://github.com/coelckers/gzdoom/archive/g%version.tar.gz
 Patch1:         gzdoom-waddir.patch
 Patch2:         gzdoom-lzma.patch
 Patch3:         gzdoom-vulkan.patch
+Patch4:         gzdoom-asmjit.patch
 BuildRequires:  cmake >= 2.8.7
 BuildRequires:  gcc-c++
 BuildRequires:  glslang-devel
@@ -92,6 +93,7 @@ GZDoom is a port (a modification) of the original Doom source code, featuring:
 %patch -P 3 -p1
 rm -Rfv glslang src/rendering/vulkan/thirdparty/vulkan
 %endif
+%patch -P 4 -p1
 perl -i -pe 's{__DATE__}{""}g' src/posix/sdl/i_main.cpp
 perl -i -pe 's{<unknown version>}{%version}g' \
 	tools/updaterevision/updaterevision.c