diff --git a/compiler/src/prog8/ast/processing/AstChecker.kt b/compiler/src/prog8/ast/processing/AstChecker.kt
index 927fafb7c..3eeef4c64 100644
--- a/compiler/src/prog8/ast/processing/AstChecker.kt
+++ b/compiler/src/prog8/ast/processing/AstChecker.kt
@@ -376,6 +376,9 @@ internal class AstChecker(private val program: Program,
                         if (sourceVar?.struct != null) {
                             if (sourceVar.struct !== targetVar.struct)
                                 errors.err("assignment of different struct types", assignment.position)
+                        } else if(sourceVar?.isArray==true) {
+                            if((sourceVar.value as ArrayLiteralValue).value.size != targetVar.struct?.numberOfElements)
+                                errors.err("number of elements doesn't match struct definition", sourceVar.position)
                         }
                     }
                 }
diff --git a/compiler/src/prog8/ast/processing/StatementReorderer.kt b/compiler/src/prog8/ast/processing/StatementReorderer.kt
index 4546c1f26..5d0af0cb4 100644
--- a/compiler/src/prog8/ast/processing/StatementReorderer.kt
+++ b/compiler/src/prog8/ast/processing/StatementReorderer.kt
@@ -187,6 +187,8 @@ internal class StatementReorderer(val program: Program) : AstWalker() {
                             // structs are not the same in assignment
                             return listOf()     // error will be printed elsewhere
                         }
+                        if(struct.statements.size!=sourceStruct.statements.size)
+                            return listOf()     // error will be printed elsewhere
                         return struct.statements.zip(sourceStruct.statements).map { member ->
                             val targetDecl = member.first as VarDecl
                             val sourceDecl = member.second as VarDecl
@@ -203,6 +205,8 @@ internal class StatementReorderer(val program: Program) : AstWalker() {
                     }
                     sourceVar.isArray -> {
                         val array = (sourceVar.value as ArrayLiteralValue).value
+                        if(struct.statements.size!=array.size)
+                            return listOf()     // error will be printed elsewhere
                         return struct.statements.zip(array).map {
                             val decl = it.first as VarDecl
                             val mangled = mangledStructMemberName(identifierName, decl.name)