diff --git a/vtk.spec b/vtk.spec
index fe30216..2931a28 100644
--- a/vtk.spec
+++ b/vtk.spec
@@ -17,7 +17,7 @@
 Summary: The Visualization Toolkit - A high level 3D visualization library
 Name: vtk
 Version: 7.1.1
-Release: 12.0.riscv64%{?dist}
+Release: 12.1.riscv64%{?dist}
 # This is a variant BSD license, a cross between BSD and ZLIB.
 # For all intents, it has the same rights and restrictions as BSD.
 # http://fedoraproject.org/wiki/Licensing/BSD#VTKBSDVariant
@@ -493,7 +493,7 @@ export CFLAGS="%{optflags} -D_UNICODE -DHAVE_UINTPTR_T"
 export CXXFLAGS="%{optflags} -D_UNICODE -DHAVE_UINTPTR_T"
 %if %{with java}
 export JAVA_HOME=/usr/lib/jvm/java
-%ifarch %{arm} s390x
+%ifarch %{arm} s390x riscv64
 # getting "java.lang.OutOfMemoryError: Java heap space" during the build
 export JAVA_TOOL_OPTIONS=-Xmx2048m
 %endif
@@ -954,6 +954,9 @@ cat xorg.log
 
 
 %changelog
+* Mon Oct 08 2018 David Abdurachmanov <david.abdurachmanov@gmail.com> - 7.1.1-12.1.riscv64
+- Avoid java.lang.OutOfMemoryError on RISC-V (riscv64)
+
 * Mon Oct 08 2018 David Abdurachmanov <david.abdurachmanov@gmail.com> - 7.1.1-12.0.riscv64
 - Add support for RISC-V (riscv64)