diff --git a/gcc/config/bpf/bpf.h b/gcc/config/bpf/bpf.h
index f107a5a4c349e0a4d6ab47314c9fc6a6ce9bdcb3..3cc5daa1b58dc4c775dd3504e25833fab0e029e9 100644
--- a/gcc/config/bpf/bpf.h
+++ b/gcc/config/bpf/bpf.h
@@ -99,7 +99,7 @@
 
 #define SIG_ATOMIC_TYPE "char"
 
-#define INT8_TYPE "char"
+#define INT8_TYPE "signed char"
 #define INT16_TYPE "short int"
 #define INT32_TYPE "int"
 #define INT64_TYPE "long int"