diff --git a/src/compiler/VariablePacker.cpp b/src/compiler/VariablePacker.cpp
index 8957287..ee70b9e 100644
--- a/src/compiler/VariablePacker.cpp
+++ b/src/compiler/VariablePacker.cpp
@@ -13,6 +13,10 @@
 {
     switch (type) {
         case SH_FLOAT_MAT4:
+        case SH_FLOAT_MAT2x4:
+        case SH_FLOAT_MAT3x4:
+        case SH_FLOAT_MAT4x2:
+        case SH_FLOAT_MAT4x3:
             return 0;
         case SH_FLOAT_MAT2:
             return 1;
@@ -21,6 +25,8 @@
         case SH_BOOL_VEC4:
             return 2;
         case SH_FLOAT_MAT3:
+        case SH_FLOAT_MAT2x3:
+        case SH_FLOAT_MAT3x2:
             return 3;
         case SH_FLOAT_VEC3:
         case SH_INT_VEC3:
@@ -50,11 +56,17 @@
     switch (type) {
         case SH_FLOAT_MAT4:
         case SH_FLOAT_MAT2:
+        case SH_FLOAT_MAT2x4:
+        case SH_FLOAT_MAT3x4:
+        case SH_FLOAT_MAT4x2:
+        case SH_FLOAT_MAT4x3:
         case SH_FLOAT_VEC4:
         case SH_INT_VEC4:
         case SH_BOOL_VEC4:
             return 4;
         case SH_FLOAT_MAT3:
+        case SH_FLOAT_MAT2x3:
+        case SH_FLOAT_MAT3x2:
         case SH_FLOAT_VEC3:
         case SH_INT_VEC3:
         case SH_BOOL_VEC3:
@@ -81,8 +93,14 @@
 {
     switch (type) {
         case SH_FLOAT_MAT4:
+        case SH_FLOAT_MAT2x4:
+        case SH_FLOAT_MAT3x4:
+        case SH_FLOAT_MAT4x3:
+        case SH_FLOAT_MAT4x2:
             return 4;
         case SH_FLOAT_MAT3:
+        case SH_FLOAT_MAT2x3:
+        case SH_FLOAT_MAT3x2:
             return 3;
         case SH_FLOAT_MAT2:
             return 2;