diff --git a/passes/memory/memlib.cc b/passes/memory/memlib.cc
index 8a7adc9ac..3a8c3c06e 100644
--- a/passes/memory/memlib.cc
+++ b/passes/memory/memlib.cc
@@ -878,7 +878,7 @@ struct Parser {
 						}
 					}
 				}
-				var.clk_en = find_single_cap(pdef.clken, cram.options, portopts, "clken");
+				var.clk_en = find_single_cap(pdef.clken, cram.options, portopts, "clken") != nullptr;
 			}
 			const PortWidthDef *wdef = find_single_cap(pdef.width, cram.options, portopts, "width");
 			if (wdef) {
diff --git a/passes/memory/memlib.h b/passes/memory/memlib.h
index 43dec7386..7394baf4e 100644
--- a/passes/memory/memlib.h
+++ b/passes/memory/memlib.h
@@ -109,7 +109,7 @@ struct PortVariant {
 	PortKind kind;
 	int clk_shared;
 	ClkPolKind clk_pol;
-	bool clk_en;
+	bool clk_en = false;
 	bool width_tied;
 	int min_wr_wide_log2;
 	int max_wr_wide_log2;