diff --git a/libr/include/r_bin.h b/libr/include/r_bin.h
index 90c56913b6..37f0ecdf70 100644
--- a/libr/include/r_bin.h
+++ b/libr/include/r_bin.h
@@ -145,7 +145,7 @@ typedef enum {
 	R_BIN_NM_MSVC = 1<<7,
 	R_BIN_NM_RUST = 1<<8,
 	R_BIN_NM_KOTLIN = 1<<9,
-	R_BIN_NM_BLOCKS = 1<<31,
+	R_BIN_NM_BLOCKS = 1U<<31,
 	R_BIN_NM_ANY = -1,
 } RBinNameMangling;