diff --git a/SoC/evalsoc/Common/npk.yml b/SoC/evalsoc/Common/npk.yml
index 535257a8..936a858d 100644
--- a/SoC/evalsoc/Common/npk.yml
+++ b/SoC/evalsoc/Common/npk.yml
@@ -493,6 +493,8 @@ buildconfig:
     common_flags: # flags need to be combined together across all packages
       # Enable experimental extensions for clang
       - flags: -menable-experimental-extensions
+      # Add zicsr extension for clang
+      - flags: -Xclang -target-feature -Xclang +zicsr
       - flags: -isystem =/include/libncrt
         condition: $( startswith(${stdclib}, "libncrt") )
     ldflags:
diff --git a/SoC/gd32vf103/Common/npk.yml b/SoC/gd32vf103/Common/npk.yml
index a4f643d0..9c2d24e9 100644
--- a/SoC/gd32vf103/Common/npk.yml
+++ b/SoC/gd32vf103/Common/npk.yml
@@ -278,6 +278,8 @@ buildconfig:
     toolchain_name: RISC-V Clang/Newlib
     cross_prefix: riscv64-unknown-elf- # optional
     common_flags: # flags need to be combined together across all packages
+      # Add zicsr extension for clang
+      - flags: -Xclang -target-feature -Xclang +zicsr
       - flags: -isystem =/include/libncrt
         condition: $( startswith(${stdclib}, "libncrt") )
     ldflags:
diff --git a/SoC/gd32vw55x/Common/npk.yml b/SoC/gd32vw55x/Common/npk.yml
index 42a48ed0..41f5fa8d 100644
--- a/SoC/gd32vw55x/Common/npk.yml
+++ b/SoC/gd32vw55x/Common/npk.yml
@@ -246,6 +246,8 @@ buildconfig:
     toolchain_name: RISC-V Clang/Newlib
     cross_prefix: riscv64-unknown-elf- # optional
     common_flags: # flags need to be combined together across all packages
+      # Add zicsr extension for clang
+      - flags: -Xclang -target-feature -Xclang +zicsr
       - flags: -isystem =/include/libncrt
         condition: $( startswith(${stdclib}, "libncrt") )
     ldflags: