diff --git a/eppic.changes b/eppic.changes
index 628e2f2..a9b108b 100644
--- a/eppic.changes
+++ b/eppic.changes
@@ -2,7 +2,7 @@
 Mon Apr 24 08:26:22 UTC 2023 - Petr Tesařík <petr@tesarici.cz>
 
 - Update to c294e5bf89cab01f3c5316474cfc5104af7e6a60
-  o Build on 32-bit Arm and RISC-V.
+  o Build on RISC-V64 and 32-bit Arm and IBM POWER.
 - Drop upstreamed patches:
   o eppic-Fix-eppic_getnxtfct.patch
   o eppic-crash-INCDIR.patch
diff --git a/eppic.spec b/eppic.spec
index 9d79c30..34a9b7b 100644
--- a/eppic.spec
+++ b/eppic.spec
@@ -98,12 +98,16 @@ case `uname -m` in
     TARGET=PPC64
     TARGET_CFLAGS=-m64
     ;;
-  s390x)
-    TARGET=S390X
+  riscv64)
+    TARGET=RISCV64
     TARGET_CFLAGS=
     ;;
   s390)
     TARGET=S390
+    TARGET_CFLAGS=-D_FILE_OFFSET_BITS=64
+    ;;
+  s390x)
+    TARGET=S390X
     TARGET_CFLAGS=
     ;;
   x86_64)