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-rw-r--r--frontends/ast/simplify.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/frontends/ast/simplify.cc b/frontends/ast/simplify.cc
index 4f105eed6..310f6fc32 100644
--- a/frontends/ast/simplify.cc
+++ b/frontends/ast/simplify.cc
@@ -2894,7 +2894,7 @@ AstNode *AstNode::readmem(bool is_readmemh, std::string mem_filename, AstNode *m
} else {
yosys_input_files.insert(mem_filename);
}
- if (f.fail())
+ if (f.fail() || strlen(mem_filename.c_str()) == 0)
log_file_error(filename, linenum, "Can not open file `%s` for %s.\n", mem_filename.c_str(), str.c_str());
log_assert(GetSize(memory->children) == 2 && memory->children[1]->type == AST_RANGE && memory->children[1]->range_valid);