diff --git a/builtInFunctions.c b/builtInFunctions.c
index c230cde..bc24f92 100644
--- a/builtInFunctions.c
+++ b/builtInFunctions.c
@@ -34,7 +34,7 @@
 #include "operandStuff.h"
 #include "semanticMisc.h"
 
-#include <strings.h>
+#include <string.h>
 
 
 /* 
diff --git a/slinky/builtins.c b/slinky/builtins.c
index c44a7bc..38b22a5 100644
--- a/slinky/builtins.c
+++ b/slinky/builtins.c
@@ -30,7 +30,7 @@
 #include "slinkyTypes.h"
 #include "slinkyGlobals.h"
 #include "slinkyExpressions.h"
-#include <strings.h>
+#include <string.h>
 
 #define getSymbol() ((symbolType *)getNumber())