diff --git a/include/cglm-vec-ext.h b/include/cglm-vec-ext.h
index a5d54cd..90f3e8f 100644
--- a/include/cglm-vec-ext.h
+++ b/include/cglm-vec-ext.h
@@ -14,6 +14,7 @@
 
 #include "cglm-common.h"
 #include "cglm-intrin.h"
+#include <stdbool.h>
 
 /*!
  * @brief multiplies individual items, just for convenient like SIMD
@@ -66,4 +67,16 @@ glm_vec4_broadcast(float val, vec3 d) {
 #endif
 }
 
+CGLM_INLINE
+bool
+glm_vec_eq(vec3 v, float val) {
+  return v[0] == v[1] == v[2] == val;
+}
+
+CGLM_INLINE
+bool
+glm_vec4_eq(vec4 v, float val) {
+  return v[0] == v[1] == v[2] == v[3] == val;
+}
+
 #endif /* cglm_vec_ext_h */