diff --git a/frame/thread/bli_thread.c b/frame/thread/bli_thread.c
index 03bc1b0a0..d7d327678 100644
--- a/frame/thread/bli_thread.c
+++ b/frame/thread/bli_thread.c
@@ -35,6 +35,22 @@
 
 #include "blis.h"
 
+// OpenMP 2.0 compatibility: Provide fallbacks for OpenMP 3.0 functions
+// Some compilers (e.g., MSVC, older GCC) only support OpenMP 2.0 which lacks:
+//   - omp_get_active_level() (OpenMP 3.0)
+//   - omp_get_max_active_levels() (OpenMP 3.0)
+// The _OPENMP macro is set to version-specific values by OpenMP-compliant compilers:
+//   200203 = OpenMP 2.0, 200811 = OpenMP 3.0, 201107 = OpenMP 3.1, etc.
+// Note: omp.h is already included by blis.h when BLIS_ENABLE_OPENMP is defined
+#if defined(BLIS_ENABLE_OPENMP) && defined(_OPENMP) && _OPENMP < 200811
+static inline int omp_get_active_level(void) {
+    return 0;  // Always assume top-level (no nested parallelism support)
+}
+static inline int omp_get_max_active_levels(void) {
+    return 1;  // OpenMP 2.0 doesn't support nested parallelism
+}
+#endif
+
 thrinfo_t BLIS_PACKM_SINGLE_THREADED = {};
 thrinfo_t BLIS_GEMM_SINGLE_THREADED  = {};
 thrcomm_t BLIS_SINGLE_COMM           = {};