diff --git a/libnum/include/num/num.h b/libnum/include/num/num.h
index 71c3124..94fe6fb 100644
--- a/libnum/include/num/num.h
+++ b/libnum/include/num/num.h
@@ -27,7 +27,7 @@
 #include <type_traits>
 #include <concepts>
 
-namespace num {
+namespace libnum {
 
 struct num8;
 struct num16;
diff --git a/libnum/src/str.cpp b/libnum/src/str.cpp
index 3713410..c0e9d87 100644
--- a/libnum/src/str.cpp
+++ b/libnum/src/str.cpp
@@ -1,5 +1,5 @@
 #include <num/num.h>
-using namespace num;
+using namespace libnum;
 
 /* Digits of the decimal part, from most to least significant. Returns the
    number of digits (which is 0 when x=0) */
diff --git a/libnum/test/isel_num16.cpp b/libnum/test/isel_num16.cpp
index 7f373ba..fb727ba 100644
--- a/libnum/test/isel_num16.cpp
+++ b/libnum/test/isel_num16.cpp
@@ -1,5 +1,5 @@
 #include <num/num.h>
-using namespace num;
+using namespace libnum;
 
 extern "C" {
 
diff --git a/libnum/test/isel_num32.cpp b/libnum/test/isel_num32.cpp
index 1260d29..b406894 100644
--- a/libnum/test/isel_num32.cpp
+++ b/libnum/test/isel_num32.cpp
@@ -1,5 +1,5 @@
 #include <num/num.h>
-using namespace num;
+using namespace libnum;
 
 extern "C" {
 
diff --git a/libnum/test/isel_num8.cpp b/libnum/test/isel_num8.cpp
index 4f5b1d6..61a74bf 100644
--- a/libnum/test/isel_num8.cpp
+++ b/libnum/test/isel_num8.cpp
@@ -1,6 +1,6 @@
 #include <num/num.h>
 
-using namespace num;
+using namespace libnum;
 
 extern "C" {
 
diff --git a/libnum/test/unit_sample.h b/libnum/test/unit_sample.h
index b01525b..2109a99 100644
--- a/libnum/test/unit_sample.h
+++ b/libnum/test/unit_sample.h
@@ -25,7 +25,7 @@
 #include <stdint.h>
 
 #include <num/num.h>
-using namespace num;
+using namespace libnum;
 
 //---
 // Integer sampling
diff --git a/libnum/test/unit_static.cpp b/libnum/test/unit_static.cpp
index 9dc8491..24bb1c0 100644
--- a/libnum/test/unit_static.cpp
+++ b/libnum/test/unit_static.cpp
@@ -6,7 +6,7 @@
 // unit_static.cpp: Compile-time evaluation tests
 
 #include <num/num.h>
-using namespace num;
+using namespace libnum;
 
 static_assert(sizeof(num8) == 1);
 static_assert(sizeof(num16) == 2);