diff --git a/mlir/include/mlir/Analysis/Presburger/IntegerRelation.h b/mlir/include/mlir/Analysis/Presburger/IntegerRelation.h
--- a/mlir/include/mlir/Analysis/Presburger/IntegerRelation.h
+++ b/mlir/include/mlir/Analysis/Presburger/IntegerRelation.h
@@ -66,7 +66,7 @@
   }
 
   /// Constructs a relation with the specified number of dimensions and symbols.
-  IntegerRelation(const PresburgerSpace &space)
+  explicit IntegerRelation(const PresburgerSpace &space)
       : IntegerRelation(/*numReservedInequalities=*/0,
                         /*numReservedEqualities=*/0,
                         /*numReservedCols=*/space.getNumIds() + 1, space) {}
@@ -567,7 +567,7 @@
 
   /// Constructs a relation with the specified number of dimensions and
   /// symbols.
-  IntegerPolyhedron(const PresburgerSpace &space)
+  explicit IntegerPolyhedron(const PresburgerSpace &space)
       : IntegerPolyhedron(/*numReservedInequalities=*/0,
                           /*numReservedEqualities=*/0,
                           /*numReservedCols=*/space.getNumIds() + 1, space) {}
diff --git a/mlir/include/mlir/Analysis/Presburger/PresburgerRelation.h b/mlir/include/mlir/Analysis/Presburger/PresburgerRelation.h
--- a/mlir/include/mlir/Analysis/Presburger/PresburgerRelation.h
+++ b/mlir/include/mlir/Analysis/Presburger/PresburgerRelation.h
@@ -116,7 +116,8 @@
 protected:
   /// Construct an empty PresburgerRelation with the specified number of
   /// dimension and symbols.
-  PresburgerRelation(const PresburgerSpace &space) : PresburgerSpace(space) {
+  explicit PresburgerRelation(const PresburgerSpace &space)
+      : PresburgerSpace(space) {
     assert(space.getNumLocalIds() == 0 &&
            "PresburgerRelation cannot have local ids.");
   }
@@ -151,7 +152,8 @@
 protected:
   /// Construct an empty PresburgerRelation with the specified number of
   /// dimension and symbols.
-  PresburgerSet(const PresburgerSpace &space) : PresburgerRelation(space) {
+  explicit PresburgerSet(const PresburgerSpace &space)
+      : PresburgerRelation(space) {
     assert(space.getNumDomainIds() == 0 && "Set type cannot have domain ids.");
     assert(space.getNumLocalIds() == 0 &&
            "PresburgerRelation cannot have local ids.");