diff --git a/igzip/proc_heap_base.c b/igzip/proc_heap_base.c
index 8794d20..1c83788 100644
--- a/igzip/proc_heap_base.c
+++ b/igzip/proc_heap_base.c
@@ -30,7 +30,7 @@
 #include "igzip_lib.h"
 #include "huff_codes.h"
 
-void inline heapify(uint64_t * heap, uint64_t heap_size, uint64_t index)
+static inline void heapify(uint64_t * heap, uint64_t heap_size, uint64_t index)
 {
 	uint64_t child = 2 * index, tmp;
 	while (child <= heap_size) {