diff --git a/base_c/include/embb/base/c/internal/atomic/compare_and_swap.h b/base_c/include/embb/base/c/internal/atomic/compare_and_swap.h
index 01c4adf..2837589 100644
--- a/base_c/include/embb/base/c/internal/atomic/compare_and_swap.h
+++ b/base_c/include/embb/base/c/internal/atomic/compare_and_swap.h
@@ -58,7 +58,7 @@
   EMBB_INLINE int EMBB_CAT2(embb_internal__atomic_compare_and_swap_, \
   EMBB_PARAMETER_SIZE_BYTE)(EMBB_CAT2(EMBB_BASE_BASIC_TYPE_SIZE_, EMBB_PARAMETER_SIZE_BYTE) volatile* pointer_to_value, EMBB_CAT2(EMBB_BASE_BASIC_TYPE_SIZE_, EMBB_PARAMETER_SIZE_BYTE) volatile* expected, \
   EMBB_CAT2(EMBB_BASE_BASIC_TYPE_SIZE_, EMBB_PARAMETER_SIZE_BYTE) desired) { \
-  register char result;                   \
+  char result; \
   __asm__ __volatile__ ("lock cmpxchg" EMBB_ATOMIC_X86_SIZE_SUFFIX\
   " %3, %0 \n\t" \
   "setz %2 \n\t" \
diff --git a/base_c/include/embb/base/c/internal/atomic/load.h b/base_c/include/embb/base/c/internal/atomic/load.h
index ebf4c20..eb689d1 100644
--- a/base_c/include/embb/base/c/internal/atomic/load.h
+++ b/base_c/include/embb/base/c/internal/atomic/load.h
@@ -59,7 +59,7 @@
   EMBB_INLINE EMBB_CAT2(EMBB_BASE_BASIC_TYPE_SIZE_, EMBB_PARAMETER_SIZE_BYTE) \
   EMBB_CAT2(embb_internal__atomic_load_, EMBB_PARAMETER_SIZE_BYTE)(EMBB_CAT2(EMBB_BASE_BASIC_TYPE_SIZE_, EMBB_PARAMETER_SIZE_BYTE) volatile* pointer_to_value) { \
   /* no fence required for loads */ \
-  register EMBB_CAT2(EMBB_BASE_BASIC_TYPE_SIZE_, EMBB_PARAMETER_SIZE_BYTE) result; \
+  EMBB_CAT2(EMBB_BASE_BASIC_TYPE_SIZE_, EMBB_PARAMETER_SIZE_BYTE) result; \
   __asm__ __volatile__("mov" EMBB_ATOMIC_X86_SIZE_SUFFIX " %1, %0" \
   : "=q" (result) \
   : "m" (*pointer_to_value) \