diff --git a/src/linalg/linalg.cpp b/src/linalg/linalg.cpp
index 7d69ee7..f6af326 100644
--- a/src/linalg/linalg.cpp
+++ b/src/linalg/linalg.cpp
@@ -2,8 +2,12 @@
 #include <sta/math/utils.hpp>
 #include <cstdint>
 #include <cmath>
+#include <iostream>
+
+#ifdef STA_CORE
 #include <sta/debug/debug.hpp>
 #include <sta/debug/assert.hpp>
+#endif
 
 namespace sta{
 
diff --git a/src/linalg/matrix.cpp b/src/linalg/matrix.cpp
index 72b6e89..1527bb0 100644
--- a/src/linalg/matrix.cpp
+++ b/src/linalg/matrix.cpp
@@ -3,8 +3,25 @@
 #include <cstdint>
 #include <cstring>
 #include <iostream>
+
+#ifdef STA_CORE
 #include <sta/debug/debug.hpp>
 #include <sta/debug/assert.hpp>
+#else
+void STA_ASSERT_MSG(int cond, const char * msg) {
+    if(!cond) {
+        printf("%s\n", msg);
+        std::exit(1);
+    }
+}
+
+#define STA_DEBUG_PRINT printf
+#define STA_DEBUG_PRINTF printf
+
+void STA_DEBUG_PRINTLN(const char * msg) {
+    printf("%s\n", msg);
+}
+#endif
 namespace sta
 {
 namespace math {
@@ -415,7 +432,7 @@ void matrix::show_serial() {
         for(uint8_t c = 0; c < get_cols(); c++) {
 
             STA_DEBUG_PRINT("| ");
-            STA_DEBUG_PRINT(operator()(r, c));
+            STA_DEBUG_PRINTF("%f", operator()(r, c));
             if(c == get_cols() - 1) {
                 STA_DEBUG_PRINTLN(" |");
             } else {
@@ -431,7 +448,7 @@ void matrix::show_serial() {
 
 void matrix::show_shape() {
 
-    STA_DEBUG_PRINTF("Matrix shape: (%d x %d)", get_rows(), get_cols());
+    STA_DEBUG_PRINTF("Matrix shape: (%d x %d)\n", get_rows(), get_cols());
 
 }