diff --git a/euclid.cpp b/euclid.cpp
index a977a551..c738c00c 100644
--- a/euclid.cpp
+++ b/euclid.cpp
@@ -13,7 +13,7 @@ EX namespace euc {
   #if HDR
   struct coord : array<int, 3> {
     explicit coord() = default;
-    constexpr explicit coord(int x, int y, int z) : array{x,y,z} {}
+    constexpr explicit coord(int x, int y, int z) : array<int,3> {{x,y,z}} {}
     coord& operator += (coord b) { for(int i: {0,1,2}) self[i] += b[i]; return self; }
     coord& operator -= (coord b) { for(int i: {0,1,2}) self[i] -= b[i]; return self; }
     coord operator + (coord b) const { coord a = self; return a += b; }
diff --git a/nonisotropic.cpp b/nonisotropic.cpp
index dafa6485..7ed02620 100644
--- a/nonisotropic.cpp
+++ b/nonisotropic.cpp
@@ -908,7 +908,7 @@ EX namespace nilv {
   struct mvec : array<int, 3> {
     /** these are in nmHeis */
     explicit mvec() = default;
-    constexpr explicit mvec(int x, int y, int z) : array{x, y, z} {}
+    constexpr explicit mvec(int x, int y, int z) : array<int, 3>{{x, y, z}} {}
     mvec inverse() {  
       auto& a = *this;
       return mvec(-a[0], -a[1], -a[2]+a[1] * a[0]);