diff --git a/lib/hashmap_c/hashmap.c b/lib/hashmap_c/hashmap.c
index 939d6bb..b983d18 100644
--- a/lib/hashmap_c/hashmap.c
+++ b/lib/hashmap_c/hashmap.c
@@ -87,7 +87,7 @@ struct hashmap *hashmap_new_with_allocator(
     _malloc = _malloc ? _malloc : malloc;
     _realloc = _realloc ? _realloc : realloc;
     _free = _free ? _free : free;
-    int ncap = 16;
+    size_t ncap = 16;
     if (cap < ncap) {
         cap = ncap;
     } else {
@@ -609,6 +609,7 @@ uint64_t hashmap_murmur(const void *data, size_t len,
     char out[16];
     MM86128(data, len, seed0, &out);
     return *(uint64_t*)out;
+    (void)seed1;
 }
 
 //==============================================================================
diff --git a/meson.build b/meson.build
index 8429645..4646d3d 100644
--- a/meson.build
+++ b/meson.build
@@ -13,6 +13,14 @@ project(
   ],
 )
 
+add_project_arguments(
+  '-Wno-implicit-fallthrough',
+  '-Wno-dangling-else',
+  '-Wno-newline-eof',
+  '-Wno-unknown-pragmas',
+  language : ['c'],
+)
+
 cc = meson.get_compiler('c')
 
 deps = [