diff --git a/ggml/src/CMakeLists.txt b/ggml/src/CMakeLists.txt
index c26c3f147..89e5180d9 100644
--- a/ggml/src/CMakeLists.txt
+++ b/ggml/src/CMakeLists.txt
@@ -438,7 +438,14 @@ if (GGML_CPU_ALL_VARIANTS)
             ggml_add_cpu_backend_variant(power8_2       POWER8  VSX)
             ggml_add_cpu_backend_variant(power9         POWER9  VSX)
             ggml_add_cpu_backend_variant(power10        POWER10 VSX)
-            ggml_add_cpu_backend_variant(power11        POWER11 VSX)
+            # POWER11 backend: only if compiler supports -mcpu=power11
+            check_cxx_compiler_flag("-mcpu=power11" GGML_CXX_SUPPORTS_POWER11)
+            if (GGML_CXX_SUPPORTS_POWER11)
+                message(STATUS "Compiler supports -mcpu=power11, enabling POWER11 backend")
+                ggml_add_cpu_backend_variant(power11 POWER11 VSX)
+            else()
+                message(STATUS "Skipping POWER11 backend: compiler does not support -mcpu=power11")
+            endif()
         else()
             message(FATAL_ERROR "Unsupported PowerPC target OS: ${CMAKE_SYSTEM_NAME}")
         endif()
diff --git a/ggml/src/ggml-cpu/CMakeLists.txt b/ggml/src/ggml-cpu/CMakeLists.txt
index 8c735a045..f7c557af4 100644
--- a/ggml/src/ggml-cpu/CMakeLists.txt
+++ b/ggml/src/ggml-cpu/CMakeLists.txt
@@ -389,7 +389,7 @@ function(ggml_add_cpu_backend_variant_impl tag_name)
             string(REGEX MATCHALL "POWER *([0-9]+)" MATCHED_STRING "${POWER10_M_UPPER}")
             string(REGEX REPLACE "POWER *([0-9]+)" "\\1" EXTRACTED_NUMBER "${MATCHED_STRING}")
 
-            if (EXTRACTED_NUMBER GREATER_EQUAL 10)
+            if (EXTRACTED_NUMBER EQUAL 10 OR EXTRACTED_NUMBER EQUAL 11)
                 list(APPEND ARCH_FLAGS -mcpu=power10)
             elseif (EXTRACTED_NUMBER EQUAL 9)
                 list(APPEND ARCH_FLAGS -mcpu=power9)