diff --git a/src/V3Gate.cpp b/src/V3Gate.cpp
index b6a94f475..e05dcbfcf 100644
--- a/src/V3Gate.cpp
+++ b/src/V3Gate.cpp
@@ -215,7 +215,7 @@ private:
     virtual void visit(AstNodeAssign* nodep, AstNUser*) {
 	m_substTreep = nodep->rhsp();
 	if (!nodep->lhsp()->castNodeVarRef())
-	    clearSimple("ASSIGN(non VARREF)");
+	    clearSimple("ASSIGN(non-VARREF)");
 	else nodep->iterateChildren(*this);
 	// We don't push logic other then assignments/NOTs into SenItems
 	// This avoids a mess in computing what exactly a POSEDGE is
diff --git a/src/V3Number.cpp b/src/V3Number.cpp
index 3026666b3..5a089a60c 100644
--- a/src/V3Number.cpp
+++ b/src/V3Number.cpp
@@ -515,7 +515,7 @@ uint32_t V3Number::toUInt() const {
 
 double V3Number::toDouble() const {
     if (VL_UNLIKELY(!isDouble())) {
-	m_fileline->v3fatalSrc("Real conversion on non real number");
+	m_fileline->v3fatalSrc("Real conversion on non-real number");
     }
     if (VL_UNLIKELY(width()!=64)) {
 	m_fileline->v3fatalSrc("Real operation on wrong sized number");
diff --git a/src/V3Simulate.h b/src/V3Simulate.h
index 438882017..f46532359 100644
--- a/src/V3Simulate.h
+++ b/src/V3Simulate.h
@@ -431,11 +431,11 @@ private:
 	if (jumpingOver(nodep)) return;
 	if (!optimizable()) return;  // Accelerate
 	if (nodep->castAssignDly()) {
-	    if (m_anyAssignComb) clearOptimizable(nodep, "Mix of dly/non dly assigns");
+	    if (m_anyAssignComb) clearOptimizable(nodep, "Mix of dly/non-dly assigns");
 	    m_anyAssignDly = true;
 	    m_inDlyAssign = true;
 	} else {
-	    if (m_anyAssignDly) clearOptimizable(nodep, "Mix of dly/non dly assigns");
+	    if (m_anyAssignDly) clearOptimizable(nodep, "Mix of dly/non-dly assigns");
 	    m_anyAssignComb = true;
 	}
 	if (!nodep->lhsp()->castVarRef()) {