diff --git a/gcc.cmake b/gcc.cmake
index 115306394..3e89b95b7 100644
--- a/gcc.cmake
+++ b/gcc.cmake
@@ -30,6 +30,10 @@ if("${CROSS_COMPILER_PREFIX}" STREQUAL "")
         set(CROSS_COMPILER_PREFIX "arm-linux-gnueabihf-" CACHE INTERNAL "")
     elseif(AARCH64)
         set(CROSS_COMPILER_PREFIX "aarch64-linux-gnu-" CACHE INTERNAL "")
+    elseif(RISCV32)
+        set(CROSS_COMPILER_PREFIX "riscv32-unknown-elf-" CACHE INTERNAL "")
+    elseif(RISCV64)
+        set(CROSS_COMPILER_PREFIX "riscv64-unknown-elf-" CACHE INTERNAL "")
     endif()
 endif()