diff --git a/glide2x/h3/minihwc/minihwc.c b/glide2x/h3/minihwc/minihwc.c
index 440c1db..5e01a2b 100644
--- a/glide2x/h3/minihwc/minihwc.c
+++ b/glide2x/h3/minihwc/minihwc.c
@@ -392,6 +392,7 @@
 
 #include <stddef.h>
 #include <stdlib.h>
+#include <string.h>
 #include <math.h>
 
 #include <3dfx.h>
diff --git a/glide3x/h3/minihwc/minihwc.c b/glide3x/h3/minihwc/minihwc.c
index 118d90b..d1f6635 100644
--- a/glide3x/h3/minihwc/minihwc.c
+++ b/glide3x/h3/minihwc/minihwc.c
@@ -527,6 +527,7 @@
 
 #include <stddef.h>
 #include <stdlib.h>
+#include <string.h>
 #include <math.h>
 
 #include <3dfx.h>