diff --git a/src/parallel_io.c b/src/parallel_io.c
index f19c1448ac4ce557069e3231d79331f0765a1e11..661f12f7de9d4985452d98e3b27f02ed4429f1d9 100644
--- a/src/parallel_io.c
+++ b/src/parallel_io.c
@@ -450,7 +450,7 @@ void prepareArray(struct engine* e, hid_t grp, char* fileName, FILE* xmfFile,
       factor);
   io_write_attribute_d(
       h_data,
-      "Conversion factor to phyical CGS (including cosmological corrections)",
+      "Conversion factor to physical CGS (including cosmological corrections)",
       factor * pow(e->cosmology->a, props.scale_factor_exponent));
 
 #ifdef SWIFT_DEBUG_CHECKS
diff --git a/src/serial_io.c b/src/serial_io.c
index bdc16c1af0ce6425b394a2cb40134af56b648f0c..0d367b1cf423d0471a0f6235fa3a1c6877e9f279 100644
--- a/src/serial_io.c
+++ b/src/serial_io.c
@@ -335,7 +335,7 @@ void prepareArray(const struct engine* e, hid_t grp, char* fileName,
       factor);
   io_write_attribute_d(
       h_data,
-      "Conversion factor to phyical CGS (including cosmological corrections)",
+      "Conversion factor to physical CGS (including cosmological corrections)",
       factor * pow(e->cosmology->a, props.scale_factor_exponent));
 
 #ifdef SWIFT_DEBUG_CHECKS
diff --git a/src/single_io.c b/src/single_io.c
index 947bf258f8f7c696e0bf5a9d339b1c98ab52a172..76a5630120df5e946093e9f046503f73bce706b6 100644
--- a/src/single_io.c
+++ b/src/single_io.c
@@ -347,7 +347,7 @@ void writeArray(const struct engine* e, hid_t grp, char* fileName,
       factor);
   io_write_attribute_d(
       h_data,
-      "Conversion factor to phyical CGS (including cosmological corrections)",
+      "Conversion factor to physical CGS (including cosmological corrections)",
       factor * pow(e->cosmology->a, props.scale_factor_exponent));
 
 #ifdef SWIFT_DEBUG_CHECKS