diff --git a/src/uhttp_buf.c b/src/uhttp_buf.c
index e549019..a81a85f 100755
--- a/src/uhttp_buf.c
+++ b/src/uhttp_buf.c
@@ -49,7 +49,7 @@ size_t uh_buf_append(struct uh_buf *buf, const void *data, size_t len)
         return 0;
 
     if (buf->len + len > buf->size) {
-        if (uh_buf_grow(buf, len * UH_BUF_SIZE_MULTIPLIER) == -1)
+        if (uh_buf_grow(buf, len << UH_BUF_SIZE_MULTIPLIER) == -1)
             len = buf->size - buf->len;
     }
 
diff --git a/src/uhttp_buf.h b/src/uhttp_buf.h
index 0b528d9..d5cef12 100755
--- a/src/uhttp_buf.h
+++ b/src/uhttp_buf.h
@@ -5,7 +5,7 @@
 #include <stdlib.h>
 #include <sys/types.h>
 
-#define UH_BUF_SIZE_MULTIPLIER 1.5
+#define UH_BUF_SIZE_MULTIPLIER 3
 
 struct uh_buf {
     char *base;     /* Buffer pointer */