diff --git a/cmake/flags-gcc-i686.cmake b/cmake/flags-gcc-i686.cmake
index 6d1afd6a9..870fbc5df 100644
--- a/cmake/flags-gcc-i686.cmake
+++ b/cmake/flags-gcc-i686.cmake
@@ -14,7 +14,7 @@
 #           Copyright 2021 David Hrdlička.
 #
 
-string(APPEND CMAKE_C_FLAGS_INIT    " -m32 -march=i686 -msse2 -mfpmath=sse ${CMAKE_C_FLAGS_INIT}")
-string(APPEND CMAKE_CXX_FLAGS_INIT  " -m32 -march=i686 -msse2 -mfpmath=sse ${CMAKE_CXX_FLAGS_INIT}")
+string(APPEND CMAKE_C_FLAGS_INIT    " -m32 -march=i686 -msse2 -mfpmath=sse -mstackrealign ${CMAKE_C_FLAGS_INIT}")
+string(APPEND CMAKE_CXX_FLAGS_INIT  " -m32 -march=i686 -msse2 -mfpmath=sse -mstackrealign ${CMAKE_CXX_FLAGS_INIT}")
 
 include(${CMAKE_CURRENT_LIST_DIR}/flags-gcc.cmake)
diff --git a/cmake/flags-gcc-x86_64.cmake b/cmake/flags-gcc-x86_64.cmake
index e373a1fec..9099d8749 100644
--- a/cmake/flags-gcc-x86_64.cmake
+++ b/cmake/flags-gcc-x86_64.cmake
@@ -14,7 +14,7 @@
 #           Copyright 2021 David Hrdlička.
 #
 
-string(APPEND CMAKE_C_FLAGS_INIT    " -m64 -march=x86-64 -msse2 -mfpmath=sse ${CMAKE_C_FLAGS_INIT}")
-string(APPEND CMAKE_CXX_FLAGS_INIT  " -m64 -march=x86-64 -msse2 -mfpmath=sse ${CMAKE_CXX_FLAGS_INIT}")
+string(APPEND CMAKE_C_FLAGS_INIT    " -m64 -march=x86-64 -msse2 -mfpmath=sse -mstackrealign ${CMAKE_C_FLAGS_INIT}")
+string(APPEND CMAKE_CXX_FLAGS_INIT  " -m64 -march=x86-64 -msse2 -mfpmath=sse -mstackrealign ${CMAKE_CXX_FLAGS_INIT}")
 
 include(${CMAKE_CURRENT_LIST_DIR}/flags-gcc.cmake)
diff --git a/cmake/flags-gcc.cmake b/cmake/flags-gcc.cmake
index 266b70d44..3339ad063 100644
--- a/cmake/flags-gcc.cmake
+++ b/cmake/flags-gcc.cmake
@@ -14,8 +14,8 @@
 #
 
 # Define our flags
-string(APPEND CMAKE_C_FLAGS_INIT                " -fomit-frame-pointer -mstackrealign -Wall -fno-strict-aliasing")
-string(APPEND CMAKE_CXX_FLAGS_INIT              " -fomit-frame-pointer -mstackrealign -Wall -fno-strict-aliasing")
+string(APPEND CMAKE_C_FLAGS_INIT                " -fomit-frame-pointer -Wall -fno-strict-aliasing")
+string(APPEND CMAKE_CXX_FLAGS_INIT              " -fomit-frame-pointer -Wall -fno-strict-aliasing")
 string(APPEND CMAKE_C_FLAGS_RELEASE_INIT        " -g0 -O3")
 string(APPEND CMAKE_CXX_FLAGS_RELEASE_INIT      " -g0 -O3")
 string(APPEND CMAKE_C_FLAGS_DEBUG_INIT          " -ggdb -Og")