diff --git a/h_malloc.c b/h_malloc.c
index 7057639..fecc539 100644
--- a/h_malloc.c
+++ b/h_malloc.c
@@ -108,10 +108,10 @@ static const size_t min_align = 16;
 #define MIN_SLAB_SIZE_CLASS_SHIFT 4
 
 #if !CONFIG_EXTENDED_SIZE_CLASSES
-static const size_t max_slab_size_class = 16384;
+static const size_t MAX_SLAB_SIZE_CLASS = 16384;
 #define MAX_SLAB_SIZE_CLASS_SHIFT 14
 #else
-static const size_t max_slab_size_class = 131072;
+static const size_t MAX_SLAB_SIZE_CLASS = 131072;
 #define MAX_SLAB_SIZE_CLASS_SHIFT 17
 #endif
 
@@ -210,7 +210,7 @@ static size_t get_slab_size(size_t slots, size_t size) {
 }
 
 // limit on the number of cached empty slabs before attempting purging instead
-static const size_t max_empty_slabs_total = 128 * 1024;
+static const size_t max_empty_slabs_total = MAX_SLAB_SIZE_CLASS;
 
 struct __attribute__((aligned(CACHELINE_SIZE))) size_class {
     struct mutex lock;
@@ -1216,7 +1216,7 @@ static void *allocate_large(size_t size) {
 }
 
 static inline void *allocate(unsigned arena, size_t size) {
-    return size <= max_slab_size_class ? allocate_small(arena, size) : allocate_large(size);
+    return size <= MAX_SLAB_SIZE_CLASS ? allocate_small(arena, size) : allocate_large(size);
 }
 
 static void deallocate_large(void *p, const size_t *expected_size) {
@@ -1248,7 +1248,7 @@ static int alloc_aligned(unsigned arena, void **memptr, size_t alignment, size_t
     }
 
     if (alignment <= PAGE_SIZE) {
-        if (size <= max_slab_size_class && alignment > min_align) {
+        if (size <= MAX_SLAB_SIZE_CLASS && alignment > min_align) {
             size = get_size_info_align(size, alignment).size;
         }
 
@@ -1299,7 +1299,7 @@ static void *alloc_aligned_simple(unsigned arena, size_t alignment, size_t size)
 }
 
 static size_t adjust_size_for_canaries(size_t size) {
-    if (size > 0 && size <= max_slab_size_class) {
+    if (size > 0 && size <= MAX_SLAB_SIZE_CLASS) {
         return size + canary_size;
     }
     return size;
@@ -1329,7 +1329,7 @@ EXPORT void *h_calloc(size_t nmemb, size_t size) {
     total_size = adjust_size_for_canaries(total_size);
     void *p = allocate(arena, total_size);
     thread_seal_metadata();
-    if (!ZERO_ON_FREE && likely(p != NULL) && total_size && total_size <= max_slab_size_class) {
+    if (!ZERO_ON_FREE && likely(p != NULL) && total_size && total_size <= MAX_SLAB_SIZE_CLASS) {
         memset(p, 0, total_size - canary_size);
     }
     return p;
@@ -1342,7 +1342,7 @@ EXPORT void *h_realloc(void *old, size_t size) {
 
     size = adjust_size_for_canaries(size);
 
-    if (size > max_slab_size_class) {
+    if (size > MAX_SLAB_SIZE_CLASS) {
         size = get_large_size_class(size);
         if (unlikely(!size)) {
             errno = ENOMEM;
@@ -1353,7 +1353,7 @@ EXPORT void *h_realloc(void *old, size_t size) {
     size_t old_size;
     if (old >= get_slab_region_start() && old < ro.slab_region_end) {
         old_size = slab_usable_size(old);
-        if (size <= max_slab_size_class && get_size_info(size).size == old_size) {
+        if (size <= MAX_SLAB_SIZE_CLASS && get_size_info(size).size == old_size) {
             return old;
         }
         thread_unseal_metadata();
@@ -1377,7 +1377,7 @@ EXPORT void *h_realloc(void *old, size_t size) {
         }
         mutex_unlock(&ra->lock);
 
-        if (size > max_slab_size_class) {
+        if (size > MAX_SLAB_SIZE_CLASS) {
             // in-place shrink
             if (size < old_size) {
                 void *new_end = (char *)old + size;
@@ -1461,11 +1461,11 @@ EXPORT void *h_realloc(void *old, size_t size) {
         return NULL;
     }
     size_t copy_size = min(size, old_size);
-    if (copy_size > 0 && copy_size <= max_slab_size_class) {
+    if (copy_size > 0 && copy_size <= MAX_SLAB_SIZE_CLASS) {
         copy_size -= canary_size;
     }
     memcpy(new, old, copy_size);
-    if (old_size <= max_slab_size_class) {
+    if (old_size <= MAX_SLAB_SIZE_CLASS) {
         deallocate_small(old, NULL);
     } else {
         deallocate_large(old, NULL);