diff --git a/headers/posix/sys/select.h b/headers/posix/sys/select.h
index ebc9d0e49d..064a0ddfb3 100644
--- a/headers/posix/sys/select.h
+++ b/headers/posix/sys/select.h
@@ -43,6 +43,9 @@ typedef struct fd_set {
 #define _FD_BITSINDEX(fd) ((fd) / NFDBITS)
 #define _FD_BIT(fd) (1L << ((fd) % NFDBITS))
 
+// FD_ZERO uses memset
+#include <string.h>
+
 #define FD_ZERO(set) memset((set), 0, sizeof(fd_set))
 #define FD_SET(fd, set) ((set)->bits[_FD_BITSINDEX(fd)] |= _FD_BIT(fd))
 #define FD_CLR(fd, set) ((set)->bits[_FD_BITSINDEX(fd)] &= ~_FD_BIT(fd))
diff --git a/src/libs/glut/glut_shapes.c b/src/libs/glut/glut_shapes.c
index 1f9d84991e..5912f525d1 100644
--- a/src/libs/glut/glut_shapes.c
+++ b/src/libs/glut/glut_shapes.c
@@ -507,7 +507,7 @@ static GLfloat idata[12][3] =
   {-Z, -X, 0}
 };
 
-static int index[20][3] =
+static int iIndex[20][3] =
 {
   {0, 4, 1},
   {0, 9, 4},
@@ -537,7 +537,7 @@ icosahedron(GLenum shadeType)
   int i;
 
   for (i = 19; i >= 0; i--) {
-    drawtriangle(i, idata, index, shadeType);
+    drawtriangle(i, idata, iIndex, shadeType);
   }
 }