diff --git a/color.cpp b/color.cpp
index 64beaa20e..e570b1bc8 100644
--- a/color.cpp
+++ b/color.cpp
@@ -6,7 +6,7 @@
 
 bool rgb_color_t::try_parse_special(const wcstring &special)
 {
-    bzero(&data, sizeof data);
+    memset(&data, 0, sizeof data);
     const wchar_t *name = special.c_str();
     if (! wcscasecmp(name, L"normal"))
     {
@@ -102,7 +102,7 @@ static unsigned char convert_color(const unsigned char rgb[3], const uint32_t *c
 
 bool rgb_color_t::try_parse_rgb(const wcstring &name)
 {
-    bzero(&data, sizeof data);
+    memset(&data, 0, sizeof data);
     /* We support the following style of rgb formats (case insensitive):
         #FA3
         #F3A035
@@ -184,7 +184,7 @@ wcstring_list_t rgb_color_t::named_color_names(void)
 
 bool rgb_color_t::try_parse_named(const wcstring &str)
 {
-    bzero(&data, sizeof data);
+    memset(&data, 0, sizeof data);
     size_t max = sizeof named_colors / sizeof *named_colors;
     for (size_t idx=0; idx < max; idx++)
     {
@@ -333,7 +333,7 @@ void rgb_color_t::parse(const wcstring &str)
     if (! success) success = try_parse_rgb(str);
     if (! success)
     {
-        bzero(&this->data, sizeof this->data);
+        memset(&this->data, 0, sizeof this->data);
         this->type = type_none;
     }
 }
diff --git a/common.cpp b/common.cpp
index fcb58bc0b..c6fa91298 100644
--- a/common.cpp
+++ b/common.cpp
@@ -217,14 +217,14 @@ static wcstring str2wcs_internal(const char *in, const size_t in_len)
             wc = ENCODE_DIRECT_BASE + (unsigned char)in[in_pos];
             result.push_back(wc);
             in_pos++;
-            bzero(&state, sizeof state);
+            memset(&state, 0, sizeof state);
         }
         else if (ret == 0)
         {
             /* Embedded null byte! */
             result.push_back(L'\0');
             in_pos++;
-            bzero(&state, sizeof state);
+            memset(&state, 0, sizeof state);
         }
         else
         {
@@ -315,7 +315,7 @@ std::string wcs2string(const wcstring &input)
         }
         else
         {
-            bzero(converted, sizeof converted);
+            memset(converted, 0, sizeof converted);
             size_t len = wcrtomb(converted, wc, &state);
             if (len == (size_t)(-1))
             {
@@ -1996,7 +1996,7 @@ void format_size_safe(char buff[128], unsigned long long sz)
 {
     const size_t buff_size = 128;
     const size_t max_len = buff_size - 1; //need to leave room for a null terminator
-    bzero(buff, buff_size);
+    memset(buff, 0, buff_size);
     size_t idx = 0;
     const char * const sz_name[]=
     {